Traumatic Brain Injury

Transcranial Magnetic Stimulation Improves Memory in Older Adults

A painless and noninvasive brain stimulation technique may help improve some types of memory in older adults, investigators reported.

One possible explanation for age-related memory loss is degradation of the neural connections between the hippocampus and the cortex. Weakening of these connections may lead to difficulties in creating new memories of specific events and the locations of objects. Scientists hypothesized that strengthening the connections between the hippocampus and cortex through repetitive transcranial magnetic stimulation (TMS) may help the storage of new memories. TMS delivers painless magnetic pulses to a particular region of the brain, changing the activity of the neurons within the targeted area.

To determine whether TMS could improve memory, 15 healthy adults over the age of 64 received TMS to a part of the cortex that communicates with the hippocampus. Treatment lasted for five days. During a separate week, each participant received five days of sham treatment, in which the setup was the same, but the stimulation was too low to influence the neural connections. Before and after each five-day session, participants were asked to remember pictures of everyday objects and pictures of outdoor scenes associated with each one. The adults’ ability to recall the scenes associated with the objects improved after receiving TMS, but not after the sham treatment.

“Our study demonstrates that TMS could potentially be used as a way to improve memory for older adults experiencing age-related memory impairments,” said John A. Walker, PhD, postdoctorate fellow at Northwestern University in Evanston, Illinois. “TMS can be used to probe the relationship between brain networks and memory experimentally, opening new doors to understanding the network basis of cognitive decline in aging.”

Heading the Ball Hurts Women More Than Men

Intentionally hitting a soccer ball with the head, or “heading,” may have more adverse brain consequences for women than men, said researchers.

Heading does not typically result in a concussion, yet growing evidence links the move to CNS damage. Previous studies using diffusion tensor imaging (DTI) have revealed that heading damages the integrity of the axons. Women appear to be more vulnerable than men to problems associated with heading, as they report more symptoms that last longer, but the reason for these gender differences remains unknown.

To assess possible gender differences in the effects of heading, researchers used DTI to examine 49 male and 49 female amateur soccer players who were matched on age and frequency of heading. Higher levels of heading were associated with decreased axonal integrity in three brain regions for men and eight brain regions for women. In seven of the areas identified in women, the association between axonal integrity and heading was significantly stronger than it was in men.

“Given similar amounts of exposure to heading, women show a greater volume of abnormality that is significantly different from what is seen in men,” said lead author Todd G. Rubin, MD, a doctoral student at Albert Einstein College of Medicine in Bronx, New York. “Identifying and understanding the basis for differences in susceptibility to injury represent key steps in determining better treatments and guidelines for safer play.”

DBS Can Individualize Treatment for Parkinson’s Disease

A new approach to deep brain stimulation (DBS) adjusts itself to deliver the appropriate amount of stimulation in patients with Parkinson’s disease, according to new research. The approach could improve symptom management and reduce side effects.

DBS has been a valuable treatment for Parkinson’s disease by helping to quell the abnormal movements that are characteristic of the disease. Traditional DBS delivers a constant level of stimulation and cannot adapt if a patient’s symptoms vary over the course of a day. As a result, a patient may sometimes receive too little stimulation, which fails to control symptoms, or too much, which causes side effects such as dyskinesia.

To match stimulation to variations in patient symptoms throughout the day, researchers and engineers developed a novel implantable device that provides DBS and records activity from the surface of the brain. Similar to a cardiac pacemaker, this adaptive device can autoadjust its level of stimulation based on a physiologic signal—in this case, brain activity related to dyskinesia. A high dyskinesia signal indicated greater likelihood of unwanted side effects and caused the device to reduce the stimulation level. A low signal indicated a higher chance of symptoms returning and triggered an increase in stimulation.

The device was tested in two patients inside and outside of the laboratory. Neither patient reported discomfort, adverse events, or worsening symptoms. In addition, the battery used as much as 45% less energy than traditional DBS, which is an important advantage, since battery replacement requires surgery.

“Our study showed that totally implanted, adaptive DBS is feasible and can be used at home in patients,” said lead author Nicole C. Swann, PhD, Assistant Professor of Human Physiology at the University of Oregon in Eugene. “Adaptive stimulation represents one of the first major advances in DBS technology since this technique was first introduced for the treatment of Parkinson’s disease 25 years ago.”

Contact Sports May Impair Memory Temporarily

Sports-related head injuries may prevent the generation of new neurons in a brain region important for memory, said investigators.

Concussion can lead to cognitive impairments, and recent evidence indicates that subconcussive hits can cause damage. The hippocampus is particularly vulnerable. One way to test the effects of head impacts on the hippocampus is a memory assessment called the mnemonic similarity test (MST), which evaluates a person’s ability to distinguish between images that are novel, previously presented, or similar to images previously presented. Accumulating evidence suggests that MST scores are related to the hippocampus’s ability to generate new neurons.

To investigate changes in memory following sports-related head injuries, researchers assessed different types of athletes in two studies. In the first study, they compared athletes with concussion, uninjured athletes who played the same sport, same-sport athletes with musculoskeletal injuries, and healthy controls. Compared with the other three groups, concussed athletes performed worse on the MST when tested two to four weeks after their injury. The scores did not remain low, however. By the time the athletes were cleared to play, their scores had improved to normal levels.

In the second study, rugby players were given the MST before the season started, halfway through the season, and one month after their last game. Scores dropped midseason, compared with preseason scores, but recovered by the postseason assessment.

“Using a cognitive test believed to be sensitive to hippocampal neurogenesis, we found that athletes with concussion show impairments that resolve following recovery,” said lead author Melissa Danielle McCradden, PhD, a postdoctoral fellow at McMaster University in Toronto. “These findings represent, to the best of our knowledge, the first reported evidence in humans suggesting a brain change that might explain the cognitive and emotional symptoms associated with mild traumatic brain injury.”

Disrupted Brain Networks May Cause Gulf War Illness

The brains of veterans with Gulf War illness (GWI) show widespread communication abnormalities in networks that support various brain functions, researchers reported. The observed patterns of impairment provide objective neurophysiologic evidence to support the self-reported symptoms of veterans with GWI.

As many as 250,000 veterans who served in Iraq, Kuwait, and Saudi Arabia during the 1991 Gulf War may currently experience GWI. Symptoms include difficulty remembering things, trouble finding words while speaking, motor coordination, mood swings, fatigue, and chronic pain. GWI is thought to result from exposure to a mix of chemical and biological warfare agents and hazardous chemicals.

To better understand brain changes in GWI, researchers compared the brains of 22 veterans with GWI to the brains of 30 healthy veterans of similar age. Using resting state functional MRI, researchers analyzed patterns of communication among regions of the brain known to control different functions and behavior. They identified changes in functional networks related to many commonly reported GWI symptoms. Individuals with GWI showed clear deficits in neural communication in the sectors of the brain responsible for visual processing, mood regulation, motor coordination, sensory processing, and language command, but increased communication in networks related to pain perception during rest.

“The results from this study provide strong evidence of neuropathology in GWI patients from exposures to neurotoxic agents,” said lead author Kaundinya Gopinath, PhD, Assistant Professor of Radiology and Imaging Sciences at Emory University in Atlanta. Next, “the aim is to establish brain mechanisms underlying GWI, which in turn can lead to development of treatments.”

Prolonged Sedation May Cause Brain Abnormalities in Infants

Full-term infants who undergo repeated anesthesia and prolonged sedation are at risk for changes in brain development, according to investigators.

Developmental impacts of prenatal exposure to sedatives have been studied widely, but less is known about the immediate and long-term neurologic and developmental effects of prolonged sedation when administered to critically ill infants after birth. Prolonged administration of opioids and benzodiazepines, which commonly are used for infants undergoing surgery, is associated with a high incidence of drug tolerance and dependence. Although negative long-term outcomes have been associated with such drug exposures in infants, these studies could not exclude other possible causes, such as prematurity or heart problems.

To study neurologic effects of prolonged sedation, researchers conducted MRI scans on full-term infants who underwent life-saving surgery that required prolonged exposure to morphine and midazolam before one year of age. Brain imaging showed several brain MRI anomalies that were not present in healthy infants, including abnormalities in gray and white matter structures and the ventricles. The number of brain MRI abnormalities significantly correlated with the average daily dose of these sedative drugs. The higher the daily dose, the more MRI irregularities were seen. The patients also had more brain fluid and a smaller total brain volume, compared with healthy infants. This pattern has been associated with long-term neurodevelopmental outcomes such as autism spectrum disorder. Taken together, these preliminary findings indicate a potential negative impact of prolonged sedation on brain growth during the first year of life, the researchers said.

“We were surprised to find higher incidence of brain abnormalities in full-term infants who underwent life-saving surgery that required prolonged sedation,” said senior author Dusica Bajic, MD, PhD, Principal Investigator at Boston Children’s Hospital. “The constellation of MRI irregularities suggests prolonged sedation may potentially contribute to delayed brain growth.” Future investigations will explore the neural mechanisms of the observed developmental effects and whether early sedation exposure may lead to long-term neurobehavioral impacts.

The Brain Preferentially Reactivates Negative Memories During Sleep

The brain selectively reactivates negative memories during sleep, prioritizing the retention of these emotional memories, which may be of greater future relevance than neutral memories and thus more worth remembering, according to investigators.

Over the past two decades, neuroscientists have gained increased understanding of how sleep boosts and stabilizes memories in the human brain. In the current study, researchers presented 57 healthy volunteers with a series of neutral and negative images. While staring straight ahead, the volunteers saw all of the negative images on one side of their field of vision (left) and all of the neutral images on the other side (right). Because the brain processes visual information in the opposite hemisphere from where it is viewed, this method allowed researchers to “tag” one hemisphere with negative content and the other with neutral content, thus enabling them to track localized memories. Participants were then shown the previously seen images for memory tests, with some of the images shown immediately after the learning phase and the rest shown after a period of wakefulness or sleep. During all memory tests, volunteers viewed the images directly in front of them, rather than to either side, and researchers asked participants to state whether an image had originally appeared to the left or right.

Participants who stayed awake in between memory tests forgot some of the original image locations, but forgetting was similar for neutral and negative images. Participants who slept between tests, on the other hand, had a much better rate of recall for the negative images than for the neutral ones. EEG recordings made during the learning phase show that the brain has encoded the distinct types of memories in its two hemispheres, with the negative images strongly encoded in the hemisphere opposite to the side of presentation. Researchers are now analyzing data that they hypothesize will show that the waking EEG pattern corresponding to emotional memories is the same pattern that is reactivated most strongly during sleep.

“This [finding] would provide a long sought-after brain-based explanation of how sleep selectively stabilizes emotional memories,” said lead author Roy Cox, PhD, research fellow in psychiatry at Beth Israel Deaconess Medical Center in Boston. “Our research substantially advances the notion that sleep plays a fundamental and complex role in the offline reorganization of waking experiences.”

Transcranial Magnetic Stimulation Improves Memory in Older Adults

A painless and noninvasive brain stimulation technique may help improve some types of memory in older adults, investigators reported.

One possible explanation for age-related memory loss is degradation of the neural connections between the hippocampus and the cortex. Weakening of these connections may lead to difficulties in creating new memories of specific events and the locations of objects. Scientists hypothesized that strengthening the connections between the hippocampus and cortex through repetitive transcranial magnetic stimulation (TMS) may help the storage of new memories. TMS delivers painless magnetic pulses to a particular region of the brain, changing the activity of the neurons within the targeted area.

To determine whether TMS could improve memory, 15 healthy adults over the age of 64 received TMS to a part of the cortex that communicates with the hippocampus. Treatment lasted for five days. During a separate week, each participant received five days of sham treatment, in which the setup was the same, but the stimulation was too low to influence the neural connections. Before and after each five-day session, participants were asked to remember pictures of everyday objects and pictures of outdoor scenes associated with each one. The adults’ ability to recall the scenes associated with the objects improved after receiving TMS, but not after the sham treatment.

“Our study demonstrates that TMS could potentially be used as a way to improve memory for older adults experiencing age-related memory impairments,” said John A. Walker, PhD, postdoctorate fellow at Northwestern University in Evanston, Illinois. “TMS can be used to probe the relationship between brain networks and memory experimentally, opening new doors to understanding the network basis of cognitive decline in aging.”

Heading the Ball Hurts Women More Than Men

Intentionally hitting a soccer ball with the head, or “heading,” may have more adverse brain consequences for women than men, said researchers.

Heading does not typically result in a concussion, yet growing evidence links the move to CNS damage. Previous studies using diffusion tensor imaging (DTI) have revealed that heading damages the integrity of the axons. Women appear to be more vulnerable than men to problems associated with heading, as they report more symptoms that last longer, but the reason for these gender differences remains unknown.

To assess possible gender differences in the effects of heading, researchers used DTI to examine 49 male and 49 female amateur soccer players who were matched on age and frequency of heading. Higher levels of heading were associated with decreased axonal integrity in three brain regions for men and eight brain regions for women. In seven of the areas identified in women, the association between axonal integrity and heading was significantly stronger than it was in men.

“Given similar amounts of exposure to heading, women show a greater volume of abnormality that is significantly different from what is seen in men,” said lead author Todd G. Rubin, MD, a doctoral student at Albert Einstein College of Medicine in Bronx, New York. “Identifying and understanding the basis for differences in susceptibility to injury represent key steps in determining better treatments and guidelines for safer play.”

DBS Can Individualize Treatment for Parkinson’s Disease

A new approach to deep brain stimulation (DBS) adjusts itself to deliver the appropriate amount of stimulation in patients with Parkinson’s disease, according to new research. The approach could improve symptom management and reduce side effects.

DBS has been a valuable treatment for Parkinson’s disease by helping to quell the abnormal movements that are characteristic of the disease. Traditional DBS delivers a constant level of stimulation and cannot adapt if a patient’s symptoms vary over the course of a day. As a result, a patient may sometimes receive too little stimulation, which fails to control symptoms, or too much, which causes side effects such as dyskinesia.

To match stimulation to variations in patient symptoms throughout the day, researchers and engineers developed a novel implantable device that provides DBS and records activity from the surface of the brain. Similar to a cardiac pacemaker, this adaptive device can autoadjust its level of stimulation based on a physiologic signal—in this case, brain activity related to dyskinesia. A high dyskinesia signal indicated greater likelihood of unwanted side effects and caused the device to reduce the stimulation level. A low signal indicated a higher chance of symptoms returning and triggered an increase in stimulation.

The device was tested in two patients inside and outside of the laboratory. Neither patient reported discomfort, adverse events, or worsening symptoms. In addition, the battery used as much as 45% less energy than traditional DBS, which is an important advantage, since battery replacement requires surgery.

“Our study showed that totally implanted, adaptive DBS is feasible and can be used at home in patients,” said lead author Nicole C. Swann, PhD, Assistant Professor of Human Physiology at the University of Oregon in Eugene. “Adaptive stimulation represents one of the first major advances in DBS technology since this technique was first introduced for the treatment of Parkinson’s disease 25 years ago.”

Contact Sports May Impair Memory Temporarily

Sports-related head injuries may prevent the generation of new neurons in a brain region important for memory, said investigators.

Concussion can lead to cognitive impairments, and recent evidence indicates that subconcussive hits can cause damage. The hippocampus is particularly vulnerable. One way to test the effects of head impacts on the hippocampus is a memory assessment called the mnemonic similarity test (MST), which evaluates a person’s ability to distinguish between images that are novel, previously presented, or similar to images previously presented. Accumulating evidence suggests that MST scores are related to the hippocampus’s ability to generate new neurons.

To investigate changes in memory following sports-related head injuries, researchers assessed different types of athletes in two studies. In the first study, they compared athletes with concussion, uninjured athletes who played the same sport, same-sport athletes with musculoskeletal injuries, and healthy controls. Compared with the other three groups, concussed athletes performed worse on the MST when tested two to four weeks after their injury. The scores did not remain low, however. By the time the athletes were cleared to play, their scores had improved to normal levels.

In the second study, rugby players were given the MST before the season started, halfway through the season, and one month after their last game. Scores dropped midseason, compared with preseason scores, but recovered by the postseason assessment.

“Using a cognitive test believed to be sensitive to hippocampal neurogenesis, we found that athletes with concussion show impairments that resolve following recovery,” said lead author Melissa Danielle McCradden, PhD, a postdoctoral fellow at McMaster University in Toronto. “These findings represent, to the best of our knowledge, the first reported evidence in humans suggesting a brain change that might explain the cognitive and emotional symptoms associated with mild traumatic brain injury.”

Disrupted Brain Networks May Cause Gulf War Illness

The brains of veterans with Gulf War illness (GWI) show widespread communication abnormalities in networks that support various brain functions, researchers reported. The observed patterns of impairment provide objective neurophysiologic evidence to support the self-reported symptoms of veterans with GWI.

As many as 250,000 veterans who served in Iraq, Kuwait, and Saudi Arabia during the 1991 Gulf War may currently experience GWI. Symptoms include difficulty remembering things, trouble finding words while speaking, motor coordination, mood swings, fatigue, and chronic pain. GWI is thought to result from exposure to a mix of chemical and biological warfare agents and hazardous chemicals.

To better understand brain changes in GWI, researchers compared the brains of 22 veterans with GWI to the brains of 30 healthy veterans of similar age. Using resting state functional MRI, researchers analyzed patterns of communication among regions of the brain known to control different functions and behavior. They identified changes in functional networks related to many commonly reported GWI symptoms. Individuals with GWI showed clear deficits in neural communication in the sectors of the brain responsible for visual processing, mood regulation, motor coordination, sensory processing, and language command, but increased communication in networks related to pain perception during rest.

“The results from this study provide strong evidence of neuropathology in GWI patients from exposures to neurotoxic agents,” said lead author Kaundinya Gopinath, PhD, Assistant Professor of Radiology and Imaging Sciences at Emory University in Atlanta. Next, “the aim is to establish brain mechanisms underlying GWI, which in turn can lead to development of treatments.”

Prolonged Sedation May Cause Brain Abnormalities in Infants

Full-term infants who undergo repeated anesthesia and prolonged sedation are at risk for changes in brain development, according to investigators.

Developmental impacts of prenatal exposure to sedatives have been studied widely, but less is known about the immediate and long-term neurologic and developmental effects of prolonged sedation when administered to critically ill infants after birth. Prolonged administration of opioids and benzodiazepines, which commonly are used for infants undergoing surgery, is associated with a high incidence of drug tolerance and dependence. Although negative long-term outcomes have been associated with such drug exposures in infants, these studies could not exclude other possible causes, such as prematurity or heart problems.

To study neurologic effects of prolonged sedation, researchers conducted MRI scans on full-term infants who underwent life-saving surgery that required prolonged exposure to morphine and midazolam before one year of age. Brain imaging showed several brain MRI anomalies that were not present in healthy infants, including abnormalities in gray and white matter structures and the ventricles. The number of brain MRI abnormalities significantly correlated with the average daily dose of these sedative drugs. The higher the daily dose, the more MRI irregularities were seen. The patients also had more brain fluid and a smaller total brain volume, compared with healthy infants. This pattern has been associated with long-term neurodevelopmental outcomes such as autism spectrum disorder. Taken together, these preliminary findings indicate a potential negative impact of prolonged sedation on brain growth during the first year of life, the researchers said.

“We were surprised to find higher incidence of brain abnormalities in full-term infants who underwent life-saving surgery that required prolonged sedation,” said senior author Dusica Bajic, MD, PhD, Principal Investigator at Boston Children’s Hospital. “The constellation of MRI irregularities suggests prolonged sedation may potentially contribute to delayed brain growth.” Future investigations will explore the neural mechanisms of the observed developmental effects and whether early sedation exposure may lead to long-term neurobehavioral impacts.

The Brain Preferentially Reactivates Negative Memories During Sleep

The brain selectively reactivates negative memories during sleep, prioritizing the retention of these emotional memories, which may be of greater future relevance than neutral memories and thus more worth remembering, according to investigators.

Over the past two decades, neuroscientists have gained increased understanding of how sleep boosts and stabilizes memories in the human brain. In the current study, researchers presented 57 healthy volunteers with a series of neutral and negative images. While staring straight ahead, the volunteers saw all of the negative images on one side of their field of vision (left) and all of the neutral images on the other side (right). Because the brain processes visual information in the opposite hemisphere from where it is viewed, this method allowed researchers to “tag” one hemisphere with negative content and the other with neutral content, thus enabling them to track localized memories. Participants were then shown the previously seen images for memory tests, with some of the images shown immediately after the learning phase and the rest shown after a period of wakefulness or sleep. During all memory tests, volunteers viewed the images directly in front of them, rather than to either side, and researchers asked participants to state whether an image had originally appeared to the left or right.

Participants who stayed awake in between memory tests forgot some of the original image locations, but forgetting was similar for neutral and negative images. Participants who slept between tests, on the other hand, had a much better rate of recall for the negative images than for the neutral ones. EEG recordings made during the learning phase show that the brain has encoded the distinct types of memories in its two hemispheres, with the negative images strongly encoded in the hemisphere opposite to the side of presentation. Researchers are now analyzing data that they hypothesize will show that the waking EEG pattern corresponding to emotional memories is the same pattern that is reactivated most strongly during sleep.

“This [finding] would provide a long sought-after brain-based explanation of how sleep selectively stabilizes emotional memories,” said lead author Roy Cox, PhD, research fellow in psychiatry at Beth Israel Deaconess Medical Center in Boston. “Our research substantially advances the notion that sleep plays a fundamental and complex role in the offline reorganization of waking experiences.”

Transcranial Magnetic Stimulation Improves Memory in Older Adults

A painless and noninvasive brain stimulation technique may help improve some types of memory in older adults, investigators reported.

One possible explanation for age-related memory loss is degradation of the neural connections between the hippocampus and the cortex. Weakening of these connections may lead to difficulties in creating new memories of specific events and the locations of objects. Scientists hypothesized that strengthening the connections between the hippocampus and cortex through repetitive transcranial magnetic stimulation (TMS) may help the storage of new memories. TMS delivers painless magnetic pulses to a particular region of the brain, changing the activity of the neurons within the targeted area.

To determine whether TMS could improve memory, 15 healthy adults over the age of 64 received TMS to a part of the cortex that communicates with the hippocampus. Treatment lasted for five days. During a separate week, each participant received five days of sham treatment, in which the setup was the same, but the stimulation was too low to influence the neural connections. Before and after each five-day session, participants were asked to remember pictures of everyday objects and pictures of outdoor scenes associated with each one. The adults’ ability to recall the scenes associated with the objects improved after receiving TMS, but not after the sham treatment.

“Our study demonstrates that TMS could potentially be used as a way to improve memory for older adults experiencing age-related memory impairments,” said John A. Walker, PhD, postdoctorate fellow at Northwestern University in Evanston, Illinois. “TMS can be used to probe the relationship between brain networks and memory experimentally, opening new doors to understanding the network basis of cognitive decline in aging.”

Heading the Ball Hurts Women More Than Men

Intentionally hitting a soccer ball with the head, or “heading,” may have more adverse brain consequences for women than men, said researchers.

Heading does not typically result in a concussion, yet growing evidence links the move to CNS damage. Previous studies using diffusion tensor imaging (DTI) have revealed that heading damages the integrity of the axons. Women appear to be more vulnerable than men to problems associated with heading, as they report more symptoms that last longer, but the reason for these gender differences remains unknown.

To assess possible gender differences in the effects of heading, researchers used DTI to examine 49 male and 49 female amateur soccer players who were matched on age and frequency of heading. Higher levels of heading were associated with decreased axonal integrity in three brain regions for men and eight brain regions for women. In seven of the areas identified in women, the association between axonal integrity and heading was significantly stronger than it was in men.

“Given similar amounts of exposure to heading, women show a greater volume of abnormality that is significantly different from what is seen in men,” said lead author Todd G. Rubin, MD, a doctoral student at Albert Einstein College of Medicine in Bronx, New York. “Identifying and understanding the basis for differences in susceptibility to injury represent key steps in determining better treatments and guidelines for safer play.”

DBS Can Individualize Treatment for Parkinson’s Disease

A new approach to deep brain stimulation (DBS) adjusts itself to deliver the appropriate amount of stimulation in patients with Parkinson’s disease, according to new research. The approach could improve symptom management and reduce side effects.

DBS has been a valuable treatment for Parkinson’s disease by helping to quell the abnormal movements that are characteristic of the disease. Traditional DBS delivers a constant level of stimulation and cannot adapt if a patient’s symptoms vary over the course of a day. As a result, a patient may sometimes receive too little stimulation, which fails to control symptoms, or too much, which causes side effects such as dyskinesia.

To match stimulation to variations in patient symptoms throughout the day, researchers and engineers developed a novel implantable device that provides DBS and records activity from the surface of the brain. Similar to a cardiac pacemaker, this adaptive device can autoadjust its level of stimulation based on a physiologic signal—in this case, brain activity related to dyskinesia. A high dyskinesia signal indicated greater likelihood of unwanted side effects and caused the device to reduce the stimulation level. A low signal indicated a higher chance of symptoms returning and triggered an increase in stimulation.

The device was tested in two patients inside and outside of the laboratory. Neither patient reported discomfort, adverse events, or worsening symptoms. In addition, the battery used as much as 45% less energy than traditional DBS, which is an important advantage, since battery replacement requires surgery.

“Our study showed that totally implanted, adaptive DBS is feasible and can be used at home in patients,” said lead author Nicole C. Swann, PhD, Assistant Professor of Human Physiology at the University of Oregon in Eugene. “Adaptive stimulation represents one of the first major advances in DBS technology since this technique was first introduced for the treatment of Parkinson’s disease 25 years ago.”

Contact Sports May Impair Memory Temporarily

Sports-related head injuries may prevent the generation of new neurons in a brain region important for memory, said investigators.

Concussion can lead to cognitive impairments, and recent evidence indicates that subconcussive hits can cause damage. The hippocampus is particularly vulnerable. One way to test the effects of head impacts on the hippocampus is a memory assessment called the mnemonic similarity test (MST), which evaluates a person’s ability to distinguish between images that are novel, previously presented, or similar to images previously presented. Accumulating evidence suggests that MST scores are related to the hippocampus’s ability to generate new neurons.

To investigate changes in memory following sports-related head injuries, researchers assessed different types of athletes in two studies. In the first study, they compared athletes with concussion, uninjured athletes who played the same sport, same-sport athletes with musculoskeletal injuries, and healthy controls. Compared with the other three groups, concussed athletes performed worse on the MST when tested two to four weeks after their injury. The scores did not remain low, however. By the time the athletes were cleared to play, their scores had improved to normal levels.

In the second study, rugby players were given the MST before the season started, halfway through the season, and one month after their last game. Scores dropped midseason, compared with preseason scores, but recovered by the postseason assessment.

“Using a cognitive test believed to be sensitive to hippocampal neurogenesis, we found that athletes with concussion show impairments that resolve following recovery,” said lead author Melissa Danielle McCradden, PhD, a postdoctoral fellow at McMaster University in Toronto. “These findings represent, to the best of our knowledge, the first reported evidence in humans suggesting a brain change that might explain the cognitive and emotional symptoms associated with mild traumatic brain injury.”

Disrupted Brain Networks May Cause Gulf War Illness

The brains of veterans with Gulf War illness (GWI) show widespread communication abnormalities in networks that support various brain functions, researchers reported. The observed patterns of impairment provide objective neurophysiologic evidence to support the self-reported symptoms of veterans with GWI.

As many as 250,000 veterans who served in Iraq, Kuwait, and Saudi Arabia during the 1991 Gulf War may currently experience GWI. Symptoms include difficulty remembering things, trouble finding words while speaking, motor coordination, mood swings, fatigue, and chronic pain. GWI is thought to result from exposure to a mix of chemical and biological warfare agents and hazardous chemicals.

To better understand brain changes in GWI, researchers compared the brains of 22 veterans with GWI to the brains of 30 healthy veterans of similar age. Using resting state functional MRI, researchers analyzed patterns of communication among regions of the brain known to control different functions and behavior. They identified changes in functional networks related to many commonly reported GWI symptoms. Individuals with GWI showed clear deficits in neural communication in the sectors of the brain responsible for visual processing, mood regulation, motor coordination, sensory processing, and language command, but increased communication in networks related to pain perception during rest.

“The results from this study provide strong evidence of neuropathology in GWI patients from exposures to neurotoxic agents,” said lead author Kaundinya Gopinath, PhD, Assistant Professor of Radiology and Imaging Sciences at Emory University in Atlanta. Next, “the aim is to establish brain mechanisms underlying GWI, which in turn can lead to development of treatments.”

Prolonged Sedation May Cause Brain Abnormalities in Infants

Full-term infants who undergo repeated anesthesia and prolonged sedation are at risk for changes in brain development, according to investigators.

Developmental impacts of prenatal exposure to sedatives have been studied widely, but less is known about the immediate and long-term neurologic and developmental effects of prolonged sedation when administered to critically ill infants after birth. Prolonged administration of opioids and benzodiazepines, which commonly are used for infants undergoing surgery, is associated with a high incidence of drug tolerance and dependence. Although negative long-term outcomes have been associated with such drug exposures in infants, these studies could not exclude other possible causes, such as prematurity or heart problems.

To study neurologic effects of prolonged sedation, researchers conducted MRI scans on full-term infants who underwent life-saving surgery that required prolonged exposure to morphine and midazolam before one year of age. Brain imaging showed several brain MRI anomalies that were not present in healthy infants, including abnormalities in gray and white matter structures and the ventricles. The number of brain MRI abnormalities significantly correlated with the average daily dose of these sedative drugs. The higher the daily dose, the more MRI irregularities were seen. The patients also had more brain fluid and a smaller total brain volume, compared with healthy infants. This pattern has been associated with long-term neurodevelopmental outcomes such as autism spectrum disorder. Taken together, these preliminary findings indicate a potential negative impact of prolonged sedation on brain growth during the first year of life, the researchers said.

“We were surprised to find higher incidence of brain abnormalities in full-term infants who underwent life-saving surgery that required prolonged sedation,” said senior author Dusica Bajic, MD, PhD, Principal Investigator at Boston Children’s Hospital. “The constellation of MRI irregularities suggests prolonged sedation may potentially contribute to delayed brain growth.” Future investigations will explore the neural mechanisms of the observed developmental effects and whether early sedation exposure may lead to long-term neurobehavioral impacts.

The Brain Preferentially Reactivates Negative Memories During Sleep

The brain selectively reactivates negative memories during sleep, prioritizing the retention of these emotional memories, which may be of greater future relevance than neutral memories and thus more worth remembering, according to investigators.

Over the past two decades, neuroscientists have gained increased understanding of how sleep boosts and stabilizes memories in the human brain. In the current study, researchers presented 57 healthy volunteers with a series of neutral and negative images. While staring straight ahead, the volunteers saw all of the negative images on one side of their field of vision (left) and all of the neutral images on the other side (right). Because the brain processes visual information in the opposite hemisphere from where it is viewed, this method allowed researchers to “tag” one hemisphere with negative content and the other with neutral content, thus enabling them to track localized memories. Participants were then shown the previously seen images for memory tests, with some of the images shown immediately after the learning phase and the rest shown after a period of wakefulness or sleep. During all memory tests, volunteers viewed the images directly in front of them, rather than to either side, and researchers asked participants to state whether an image had originally appeared to the left or right.

Participants who stayed awake in between memory tests forgot some of the original image locations, but forgetting was similar for neutral and negative images. Participants who slept between tests, on the other hand, had a much better rate of recall for the negative images than for the neutral ones. EEG recordings made during the learning phase show that the brain has encoded the distinct types of memories in its two hemispheres, with the negative images strongly encoded in the hemisphere opposite to the side of presentation. Researchers are now analyzing data that they hypothesize will show that the waking EEG pattern corresponding to emotional memories is the same pattern that is reactivated most strongly during sleep.

“This [finding] would provide a long sought-after brain-based explanation of how sleep selectively stabilizes emotional memories,” said lead author Roy Cox, PhD, research fellow in psychiatry at Beth Israel Deaconess Medical Center in Boston. “Our research substantially advances the notion that sleep plays a fundamental and complex role in the offline reorganization of waking experiences.”

Imaging Shows Youth Football’s Effects on the Brain

School-age football players with a history of concussion and high impact exposure undergo brain changes after one season of play, according to two studies conducted at the University of Texas Southwestern Medical Center in Dallas and Wake Forest University in Winston-Salem, North Carolina.

Both studies analyzed the default mode network (DMN), a system of brain regions that is active during wakeful rest. Changes in the DMN are observed in patients with mental disorders. Decreased connectivity within the network is also associated with traumatic brain injury.

“The DMN exists in the deep gray matter areas of the brain,” said Elizabeth M. Davenport, PhD, a postdoctoral researcher in the Advanced NeuroScience Imaging Research (ANSIR) lab at UT Southwestern’s O’Donnell Brain Institute. “It includes structures that activate when we are awake and engaging in introspection or processing emotions, which are activities that are important for brain health.”

In the first study, researchers studied youth football players without a history of concussion to identify the effect of repeated subconcussive impacts on the DMN.

“Over a season of football, players are exposed to numerous head impacts. The vast majority of these do not result in concussion,” said Gowtham Krishnan Murugesan, a PhD student in biomedical engineering and member of the ANSIR laboratory. “This work adds to a growing body of literature indicating that subconcussive head impacts can have an effect on the brain. This is a highly understudied area at the youth and high school level.”

For the study, 26 youth football players (ages 9–13) were outfitted with the Head Impact Telemetry System (HITS) for an entire football season. HITS helmets are lined with accelerometers that measure the magnitude, location, and direction of impacts to the head. Impact data from the helmets were used to calculate a risk of concussion exposure for each player.

Players were separated into high and low concussion exposure groups. Players with a history of concussion were excluded. A third group of 13 noncontact sport controls was established. Pre- and post-season resting functional MRI (fMRI) scans were performed on all players and controls, and connectivity within the DMN subcomponents was analyzed. The researchers used machine learning to analyze the fMRI data.

“Machine learning has a lot to add to our research because it gives us a fresh perspective and an ability to analyze the complex relationships within the data,” said Mr. Murugesan. “Our results suggest an increasing functional change in the brain with increasing head impact exposure.”

Five machine learning classification algorithms were used to predict whether players were in the high-exposure, low-exposure or noncontact groups, based on the fMRI results. The algorithm discriminated between high-impact exposure and noncontact controls with 82% accuracy, and between low-impact exposure and noncontact controls with 70% accuracy. The results suggest an increasing functional change with increasing head-impact exposure.

“The brains of these youth and adolescent athletes are undergoing rapid maturation in this age range. This study demonstrates that playing a season of contact sports at the youth level can produce neuroimaging brain changes, particularly for the DMN,” Mr. Murugesan said.

In the second study, 20 high school football players (median age, 16.9) wore helmets outfitted with HITS for a season. Of the 20 players, five had experienced at least one concussion, and 15 had no history of concussion.

Before and following the season, the players underwent an eight-minute magnetoencephalography (MEG) scan, which records and analyzes the magnetic fields produced by brain activity. Researchers then analyzed the MEG power associated with the eight brain regions of the DMN.

Post-season, the five players with a history of concussion had significantly lower connectivity between DMN regions. Players with no history of concussion had, on average, an increase in DMN connectivity.

The results demonstrate that concussions from previous years can influence the changes occurring in the brain during the current season, suggesting that longitudinal effects of concussion affect brain function.

“The brain’s DMN changes differently as a result of previous concussion,” said Dr. Davenport. “Previous concussion seems to prime the brain for additional changes. Concussion history may be affecting the brain’s ability to compensate for subconcussive impacts.”

Both researchers said that larger data sets, longitudinal studies that follow young football players, and research that combines MEG and fMRI are needed to better understand the complex factors involved in concussions.

Neurofeedback May Help Treat Tinnitus

Functional MRI (fMRI) suggests that neurofeedback training has the potential to reduce the severity of tinnitus or eliminate it.

Tinnitus affects approximately one in five people. As patients focus more on the noise, they become more frustrated and anxious, which in turn makes the noise seem worse. The primary auditory cortex has been implicated in tinnitus-related distress.

Researchers examined a potential way to treat tinnitus by having people use neurofeedback training to divert their focus from the sounds in their ears. Neurofeedback is a way of training the brain by allowing an individual to view an external indicator of brain activity and attempt to exert control over it.

“The idea is that in people with tinnitus, there is an overattention drawn to the auditory cortex, making it more active than in a healthy person,” said Matthew S. Sherwood, PhD, a research engineer in the Department of Biomedical, Industrial, and Human Factors Engineering at Wright State University in Fairborn, Ohio. “Our hope is that tinnitus sufferers could use neurofeedback to divert attention away from their tinnitus and possibly make it go away.”

To determine the potential efficacy of this approach, the researchers asked 18 healthy volunteers with normal hearing to undergo five fMRI-neurofeedback training sessions. Study participants were given earplugs through which white noise could be introduced. The earplugs also blocked out the scanner noise.

To obtain fMRI results, the researchers used single-shot echoplanar imaging, an MRI technique that is sensitive to blood oxygen levels, providing an indirect measure of brain activity.

“We started with alternating periods of sound and no sound in order to create a map of the brain and find areas that produced the highest activity during the sound phase,” said Dr. Sherwood. “Then we selected the voxels that were heavily activated when sound was being played.”

The subjects then participated in the fMRI-neurofeedback training phase while inside the MRI scanner. They received white noise through their earplugs and were able to view the activity in their primary auditory cortex as a bar on a screen. Each fMRI-neurofeedback training session contained eight blocks separated into a 30-second “relax” period, followed by a 30-second “lower” period. Participants were instructed to watch the bar during the relax period and attempt to lower it by decreasing primary auditory cortex activity during the lower phase. The researchers gave the participants techniques to help them do this, such as trying to divert attention from sound to other sensations like touch and sight.

“Many focused on breathing because it gave them a feeling of control,” said Dr. Sherwood. “By diverting their attention away from sound, the participants’ auditory cortex activity went down, and the signal we were measuring also went down.”

A control group of nine individuals was provided sham neurofeedback. They performed the same tasks as the other group, but the feedback came not from them, but from a random participant. By performing the exact same procedures with both groups using either real or sham neurofeedback, the researchers were able to distinguish the effect of real neurofeedback on control of the primary auditory cortex.

The study represents the first time that fMRI-neurofeedback training has been applied to demonstrate that there is a significant relationship between control of the primary auditory cortex and attentional processes. This result is important to therapeutic development, said Dr. Sherwood, because the neural mechanisms of tinnitus are unknown, but likely related to attention.

The results represent a promising avenue of research that could lead to improvements in other areas of health, like pain management, according to Dr. Sherwood. “Ultimately, we would like to take what we learned from MRI and develop a neurofeedback program that does not require MRI to use, such as an app or home-based therapy that could apply to tinnitus and other conditions,” he said.

Migraine Is Associated With High Sodium Levels in CSF

Migraineurs have significantly higher sodium concentrations in their CSF than people without migraine, according to the first study to use a technique called sodium MRI to examine patients with migraine.

Diagnosis of migraine is challenging, as the characteristics of migraines and the types of attacks vary widely among patients. Consequently, many patients with migraine are undiagnosed and untreated. Other patients, in contrast, are treated with medications for migraines even though they have a different type of headache, such as tension-type headache.

“It would be helpful to have a diagnostic tool supporting or even diagnosing migraine and differentiating migraine from all other types of headache,” said Melissa Meyer, MD, a radiology resident at the Institute of Clinical Radiology and Nuclear Medicine at University Hospital Mannheim and Heidelberg University in Heidelberg, Germany.

Dr. Meyer and colleagues explored a technique called cerebral sodium MRI as a possible means to help in the diagnosis and understanding of migraine. While MRI most often relies on protons to generate an image, sodium can be visualized as well. Research has shown that sodium plays an important role in brain chemistry.

The researchers recruited 12 women (mean age, 34) who had been clinically evaluated for migraine. The women filled out a questionnaire regarding the length, intensity, and frequency of their migraine attacks and accompanying auras. The researchers also enrolled 12 healthy women of similar age as a control group. Both groups underwent cerebral sodium MRI. Sodium concentrations of patients with migraine and healthy controls were compared and statistically analyzed.

The researchers found no significant differences between the two groups in sodium concentrations in the gray and white matter, brainstem, and cerebellum. Significant differences emerged, however, when the researchers looked at sodium concentrations in the CSF. Overall, sodium concentrations were significantly higher in the CSF of migraineurs than in healthy controls.

“These findings might facilitate the challenging diagnosis of a migraine,” said Dr. Meyer. The researchers hope to learn more about the connection between migraine and sodium in future studies. “As this was an exploratory study, we plan to examine more patients, preferably during or shortly after a migraine attack, for further validation.”

Gadolinium May Not Cause Neurologic Harm

There is no evidence that accumulation of gadolinium in the brain speeds cognitive decline, according to researchers.

“Approximately 400 million doses of gadolinium have been administered since 1988,” said Robert J. McDonald, MD, PhD, a neuroradiologist at the Mayo Clinic in Rochester, Minnesota. “Gadolinium contrast material is used in 40% to 50% of MRI scans performed today.”

Scientists previously believed that gadolinium contrast material could not cross the blood–brain barrier. Recent studies, however, including one by Dr. McDonald and colleagues, found that traces of gadolinium could be retained in the brain for years after MRI.

On September 8, 2017, the FDA recommended adding a warning about gadolinium retention in various organs, including the brain, to labels for gadolinium-based contrast agents used during MRI. The FDA highlighted several specific patient populations at greater risk, including children and pregnant women. Yet little is known about the health effects, if any, of gadolinium that is retained in the brain.

For this study, Dr. McDonald and colleagues set out to identify the neurotoxic potential of intracranial gadolinium deposition following IV administration of gadolinium-based contrast agents during MRI. The researchers used the Mayo Clinic Study of Aging (MCSA), the world’s largest prospective population-based cohort on aging, to study the effects of gadolinium exposure on neurologic and neurocognitive function.

All MCSA participants underwent extensive neurologic evaluation and neuropsychologic testing at baseline and 15-month follow-up intervals. Neurologic and neurocognitive scores were compared using standard methods between MCSA patients with no history of prior gadolinium exposure and those who had undergone prior MRI with gadolinium-based contrast agents. Progression from normal cognitive status to mild cognitive impairment and dementia was assessed using multistate Markov model analysis.

The study included 4,261 cognitively normal men and women between ages 50 and 90 (mean age, 72). Mean length of study participation was 3.7 years. Of the 4,261 participants, 1,092 (25.6%) had received one or more doses of gadolinium-based contrast agents, with at least one participant receiving as many as 28 prior doses. Median time since first gadolinium exposure was 5.6 years.

After adjusting for age, sex, education level, baseline neurocognitive performance, and other factors, gadolinium exposure was not a significant predictor of cognitive decline, dementia, diminished neuropsychologic performance, or diminished motor performance. No dose-related effects were observed among these metrics. Gadolinium exposure was not an independent risk factor in the rate of cognitive decline from normal cognitive status to dementia in this study group.

“There is concern over the safety of gadolinium-based contrast agents, particularly relating to gadolinium retention in the brain and other tissues,” said Dr. McDonald. “This study provides useful data that at the reasonable doses [that] 95% of the population is likely to receive in their lifetime, there is no evidence at this point that gadolinium retention in the brain is associated with adverse clinical outcomes.”

Imaging Shows Youth Football’s Effects on the Brain

School-age football players with a history of concussion and high impact exposure undergo brain changes after one season of play, according to two studies conducted at the University of Texas Southwestern Medical Center in Dallas and Wake Forest University in Winston-Salem, North Carolina.

Both studies analyzed the default mode network (DMN), a system of brain regions that is active during wakeful rest. Changes in the DMN are observed in patients with mental disorders. Decreased connectivity within the network is also associated with traumatic brain injury.

“The DMN exists in the deep gray matter areas of the brain,” said Elizabeth M. Davenport, PhD, a postdoctoral researcher in the Advanced NeuroScience Imaging Research (ANSIR) lab at UT Southwestern’s O’Donnell Brain Institute. “It includes structures that activate when we are awake and engaging in introspection or processing emotions, which are activities that are important for brain health.”

In the first study, researchers studied youth football players without a history of concussion to identify the effect of repeated subconcussive impacts on the DMN.

“Over a season of football, players are exposed to numerous head impacts. The vast majority of these do not result in concussion,” said Gowtham Krishnan Murugesan, a PhD student in biomedical engineering and member of the ANSIR laboratory. “This work adds to a growing body of literature indicating that subconcussive head impacts can have an effect on the brain. This is a highly understudied area at the youth and high school level.”

For the study, 26 youth football players (ages 9–13) were outfitted with the Head Impact Telemetry System (HITS) for an entire football season. HITS helmets are lined with accelerometers that measure the magnitude, location, and direction of impacts to the head. Impact data from the helmets were used to calculate a risk of concussion exposure for each player.

Players were separated into high and low concussion exposure groups. Players with a history of concussion were excluded. A third group of 13 noncontact sport controls was established. Pre- and post-season resting functional MRI (fMRI) scans were performed on all players and controls, and connectivity within the DMN subcomponents was analyzed. The researchers used machine learning to analyze the fMRI data.

“Machine learning has a lot to add to our research because it gives us a fresh perspective and an ability to analyze the complex relationships within the data,” said Mr. Murugesan. “Our results suggest an increasing functional change in the brain with increasing head impact exposure.”

Five machine learning classification algorithms were used to predict whether players were in the high-exposure, low-exposure or noncontact groups, based on the fMRI results. The algorithm discriminated between high-impact exposure and noncontact controls with 82% accuracy, and between low-impact exposure and noncontact controls with 70% accuracy. The results suggest an increasing functional change with increasing head-impact exposure.

“The brains of these youth and adolescent athletes are undergoing rapid maturation in this age range. This study demonstrates that playing a season of contact sports at the youth level can produce neuroimaging brain changes, particularly for the DMN,” Mr. Murugesan said.

In the second study, 20 high school football players (median age, 16.9) wore helmets outfitted with HITS for a season. Of the 20 players, five had experienced at least one concussion, and 15 had no history of concussion.

Before and following the season, the players underwent an eight-minute magnetoencephalography (MEG) scan, which records and analyzes the magnetic fields produced by brain activity. Researchers then analyzed the MEG power associated with the eight brain regions of the DMN.

Post-season, the five players with a history of concussion had significantly lower connectivity between DMN regions. Players with no history of concussion had, on average, an increase in DMN connectivity.

The results demonstrate that concussions from previous years can influence the changes occurring in the brain during the current season, suggesting that longitudinal effects of concussion affect brain function.

“The brain’s DMN changes differently as a result of previous concussion,” said Dr. Davenport. “Previous concussion seems to prime the brain for additional changes. Concussion history may be affecting the brain’s ability to compensate for subconcussive impacts.”

Both researchers said that larger data sets, longitudinal studies that follow young football players, and research that combines MEG and fMRI are needed to better understand the complex factors involved in concussions.

Neurofeedback May Help Treat Tinnitus

Functional MRI (fMRI) suggests that neurofeedback training has the potential to reduce the severity of tinnitus or eliminate it.

Tinnitus affects approximately one in five people. As patients focus more on the noise, they become more frustrated and anxious, which in turn makes the noise seem worse. The primary auditory cortex has been implicated in tinnitus-related distress.

Researchers examined a potential way to treat tinnitus by having people use neurofeedback training to divert their focus from the sounds in their ears. Neurofeedback is a way of training the brain by allowing an individual to view an external indicator of brain activity and attempt to exert control over it.

“The idea is that in people with tinnitus, there is an overattention drawn to the auditory cortex, making it more active than in a healthy person,” said Matthew S. Sherwood, PhD, a research engineer in the Department of Biomedical, Industrial, and Human Factors Engineering at Wright State University in Fairborn, Ohio. “Our hope is that tinnitus sufferers could use neurofeedback to divert attention away from their tinnitus and possibly make it go away.”

To determine the potential efficacy of this approach, the researchers asked 18 healthy volunteers with normal hearing to undergo five fMRI-neurofeedback training sessions. Study participants were given earplugs through which white noise could be introduced. The earplugs also blocked out the scanner noise.

To obtain fMRI results, the researchers used single-shot echoplanar imaging, an MRI technique that is sensitive to blood oxygen levels, providing an indirect measure of brain activity.

“We started with alternating periods of sound and no sound in order to create a map of the brain and find areas that produced the highest activity during the sound phase,” said Dr. Sherwood. “Then we selected the voxels that were heavily activated when sound was being played.”

The subjects then participated in the fMRI-neurofeedback training phase while inside the MRI scanner. They received white noise through their earplugs and were able to view the activity in their primary auditory cortex as a bar on a screen. Each fMRI-neurofeedback training session contained eight blocks separated into a 30-second “relax” period, followed by a 30-second “lower” period. Participants were instructed to watch the bar during the relax period and attempt to lower it by decreasing primary auditory cortex activity during the lower phase. The researchers gave the participants techniques to help them do this, such as trying to divert attention from sound to other sensations like touch and sight.

“Many focused on breathing because it gave them a feeling of control,” said Dr. Sherwood. “By diverting their attention away from sound, the participants’ auditory cortex activity went down, and the signal we were measuring also went down.”

A control group of nine individuals was provided sham neurofeedback. They performed the same tasks as the other group, but the feedback came not from them, but from a random participant. By performing the exact same procedures with both groups using either real or sham neurofeedback, the researchers were able to distinguish the effect of real neurofeedback on control of the primary auditory cortex.

The study represents the first time that fMRI-neurofeedback training has been applied to demonstrate that there is a significant relationship between control of the primary auditory cortex and attentional processes. This result is important to therapeutic development, said Dr. Sherwood, because the neural mechanisms of tinnitus are unknown, but likely related to attention.

The results represent a promising avenue of research that could lead to improvements in other areas of health, like pain management, according to Dr. Sherwood. “Ultimately, we would like to take what we learned from MRI and develop a neurofeedback program that does not require MRI to use, such as an app or home-based therapy that could apply to tinnitus and other conditions,” he said.

Migraine Is Associated With High Sodium Levels in CSF

Migraineurs have significantly higher sodium concentrations in their CSF than people without migraine, according to the first study to use a technique called sodium MRI to examine patients with migraine.

Diagnosis of migraine is challenging, as the characteristics of migraines and the types of attacks vary widely among patients. Consequently, many patients with migraine are undiagnosed and untreated. Other patients, in contrast, are treated with medications for migraines even though they have a different type of headache, such as tension-type headache.

“It would be helpful to have a diagnostic tool supporting or even diagnosing migraine and differentiating migraine from all other types of headache,” said Melissa Meyer, MD, a radiology resident at the Institute of Clinical Radiology and Nuclear Medicine at University Hospital Mannheim and Heidelberg University in Heidelberg, Germany.

Dr. Meyer and colleagues explored a technique called cerebral sodium MRI as a possible means to help in the diagnosis and understanding of migraine. While MRI most often relies on protons to generate an image, sodium can be visualized as well. Research has shown that sodium plays an important role in brain chemistry.

The researchers recruited 12 women (mean age, 34) who had been clinically evaluated for migraine. The women filled out a questionnaire regarding the length, intensity, and frequency of their migraine attacks and accompanying auras. The researchers also enrolled 12 healthy women of similar age as a control group. Both groups underwent cerebral sodium MRI. Sodium concentrations of patients with migraine and healthy controls were compared and statistically analyzed.

The researchers found no significant differences between the two groups in sodium concentrations in the gray and white matter, brainstem, and cerebellum. Significant differences emerged, however, when the researchers looked at sodium concentrations in the CSF. Overall, sodium concentrations were significantly higher in the CSF of migraineurs than in healthy controls.

“These findings might facilitate the challenging diagnosis of a migraine,” said Dr. Meyer. The researchers hope to learn more about the connection between migraine and sodium in future studies. “As this was an exploratory study, we plan to examine more patients, preferably during or shortly after a migraine attack, for further validation.”

Gadolinium May Not Cause Neurologic Harm

There is no evidence that accumulation of gadolinium in the brain speeds cognitive decline, according to researchers.

“Approximately 400 million doses of gadolinium have been administered since 1988,” said Robert J. McDonald, MD, PhD, a neuroradiologist at the Mayo Clinic in Rochester, Minnesota. “Gadolinium contrast material is used in 40% to 50% of MRI scans performed today.”

Scientists previously believed that gadolinium contrast material could not cross the blood–brain barrier. Recent studies, however, including one by Dr. McDonald and colleagues, found that traces of gadolinium could be retained in the brain for years after MRI.

On September 8, 2017, the FDA recommended adding a warning about gadolinium retention in various organs, including the brain, to labels for gadolinium-based contrast agents used during MRI. The FDA highlighted several specific patient populations at greater risk, including children and pregnant women. Yet little is known about the health effects, if any, of gadolinium that is retained in the brain.

For this study, Dr. McDonald and colleagues set out to identify the neurotoxic potential of intracranial gadolinium deposition following IV administration of gadolinium-based contrast agents during MRI. The researchers used the Mayo Clinic Study of Aging (MCSA), the world’s largest prospective population-based cohort on aging, to study the effects of gadolinium exposure on neurologic and neurocognitive function.

All MCSA participants underwent extensive neurologic evaluation and neuropsychologic testing at baseline and 15-month follow-up intervals. Neurologic and neurocognitive scores were compared using standard methods between MCSA patients with no history of prior gadolinium exposure and those who had undergone prior MRI with gadolinium-based contrast agents. Progression from normal cognitive status to mild cognitive impairment and dementia was assessed using multistate Markov model analysis.

The study included 4,261 cognitively normal men and women between ages 50 and 90 (mean age, 72). Mean length of study participation was 3.7 years. Of the 4,261 participants, 1,092 (25.6%) had received one or more doses of gadolinium-based contrast agents, with at least one participant receiving as many as 28 prior doses. Median time since first gadolinium exposure was 5.6 years.

After adjusting for age, sex, education level, baseline neurocognitive performance, and other factors, gadolinium exposure was not a significant predictor of cognitive decline, dementia, diminished neuropsychologic performance, or diminished motor performance. No dose-related effects were observed among these metrics. Gadolinium exposure was not an independent risk factor in the rate of cognitive decline from normal cognitive status to dementia in this study group.

“There is concern over the safety of gadolinium-based contrast agents, particularly relating to gadolinium retention in the brain and other tissues,” said Dr. McDonald. “This study provides useful data that at the reasonable doses [that] 95% of the population is likely to receive in their lifetime, there is no evidence at this point that gadolinium retention in the brain is associated with adverse clinical outcomes.”

Imaging Shows Youth Football’s Effects on the Brain

School-age football players with a history of concussion and high impact exposure undergo brain changes after one season of play, according to two studies conducted at the University of Texas Southwestern Medical Center in Dallas and Wake Forest University in Winston-Salem, North Carolina.

Both studies analyzed the default mode network (DMN), a system of brain regions that is active during wakeful rest. Changes in the DMN are observed in patients with mental disorders. Decreased connectivity within the network is also associated with traumatic brain injury.

“The DMN exists in the deep gray matter areas of the brain,” said Elizabeth M. Davenport, PhD, a postdoctoral researcher in the Advanced NeuroScience Imaging Research (ANSIR) lab at UT Southwestern’s O’Donnell Brain Institute. “It includes structures that activate when we are awake and engaging in introspection or processing emotions, which are activities that are important for brain health.”

In the first study, researchers studied youth football players without a history of concussion to identify the effect of repeated subconcussive impacts on the DMN.

“Over a season of football, players are exposed to numerous head impacts. The vast majority of these do not result in concussion,” said Gowtham Krishnan Murugesan, a PhD student in biomedical engineering and member of the ANSIR laboratory. “This work adds to a growing body of literature indicating that subconcussive head impacts can have an effect on the brain. This is a highly understudied area at the youth and high school level.”

For the study, 26 youth football players (ages 9–13) were outfitted with the Head Impact Telemetry System (HITS) for an entire football season. HITS helmets are lined with accelerometers that measure the magnitude, location, and direction of impacts to the head. Impact data from the helmets were used to calculate a risk of concussion exposure for each player.

Players were separated into high and low concussion exposure groups. Players with a history of concussion were excluded. A third group of 13 noncontact sport controls was established. Pre- and post-season resting functional MRI (fMRI) scans were performed on all players and controls, and connectivity within the DMN subcomponents was analyzed. The researchers used machine learning to analyze the fMRI data.

“Machine learning has a lot to add to our research because it gives us a fresh perspective and an ability to analyze the complex relationships within the data,” said Mr. Murugesan. “Our results suggest an increasing functional change in the brain with increasing head impact exposure.”

Five machine learning classification algorithms were used to predict whether players were in the high-exposure, low-exposure or noncontact groups, based on the fMRI results. The algorithm discriminated between high-impact exposure and noncontact controls with 82% accuracy, and between low-impact exposure and noncontact controls with 70% accuracy. The results suggest an increasing functional change with increasing head-impact exposure.

“The brains of these youth and adolescent athletes are undergoing rapid maturation in this age range. This study demonstrates that playing a season of contact sports at the youth level can produce neuroimaging brain changes, particularly for the DMN,” Mr. Murugesan said.

In the second study, 20 high school football players (median age, 16.9) wore helmets outfitted with HITS for a season. Of the 20 players, five had experienced at least one concussion, and 15 had no history of concussion.

Before and following the season, the players underwent an eight-minute magnetoencephalography (MEG) scan, which records and analyzes the magnetic fields produced by brain activity. Researchers then analyzed the MEG power associated with the eight brain regions of the DMN.

Post-season, the five players with a history of concussion had significantly lower connectivity between DMN regions. Players with no history of concussion had, on average, an increase in DMN connectivity.

The results demonstrate that concussions from previous years can influence the changes occurring in the brain during the current season, suggesting that longitudinal effects of concussion affect brain function.

“The brain’s DMN changes differently as a result of previous concussion,” said Dr. Davenport. “Previous concussion seems to prime the brain for additional changes. Concussion history may be affecting the brain’s ability to compensate for subconcussive impacts.”

Both researchers said that larger data sets, longitudinal studies that follow young football players, and research that combines MEG and fMRI are needed to better understand the complex factors involved in concussions.

Neurofeedback May Help Treat Tinnitus

Functional MRI (fMRI) suggests that neurofeedback training has the potential to reduce the severity of tinnitus or eliminate it.

Tinnitus affects approximately one in five people. As patients focus more on the noise, they become more frustrated and anxious, which in turn makes the noise seem worse. The primary auditory cortex has been implicated in tinnitus-related distress.

Researchers examined a potential way to treat tinnitus by having people use neurofeedback training to divert their focus from the sounds in their ears. Neurofeedback is a way of training the brain by allowing an individual to view an external indicator of brain activity and attempt to exert control over it.

“The idea is that in people with tinnitus, there is an overattention drawn to the auditory cortex, making it more active than in a healthy person,” said Matthew S. Sherwood, PhD, a research engineer in the Department of Biomedical, Industrial, and Human Factors Engineering at Wright State University in Fairborn, Ohio. “Our hope is that tinnitus sufferers could use neurofeedback to divert attention away from their tinnitus and possibly make it go away.”

To determine the potential efficacy of this approach, the researchers asked 18 healthy volunteers with normal hearing to undergo five fMRI-neurofeedback training sessions. Study participants were given earplugs through which white noise could be introduced. The earplugs also blocked out the scanner noise.

To obtain fMRI results, the researchers used single-shot echoplanar imaging, an MRI technique that is sensitive to blood oxygen levels, providing an indirect measure of brain activity.

“We started with alternating periods of sound and no sound in order to create a map of the brain and find areas that produced the highest activity during the sound phase,” said Dr. Sherwood. “Then we selected the voxels that were heavily activated when sound was being played.”

The subjects then participated in the fMRI-neurofeedback training phase while inside the MRI scanner. They received white noise through their earplugs and were able to view the activity in their primary auditory cortex as a bar on a screen. Each fMRI-neurofeedback training session contained eight blocks separated into a 30-second “relax” period, followed by a 30-second “lower” period. Participants were instructed to watch the bar during the relax period and attempt to lower it by decreasing primary auditory cortex activity during the lower phase. The researchers gave the participants techniques to help them do this, such as trying to divert attention from sound to other sensations like touch and sight.

“Many focused on breathing because it gave them a feeling of control,” said Dr. Sherwood. “By diverting their attention away from sound, the participants’ auditory cortex activity went down, and the signal we were measuring also went down.”

A control group of nine individuals was provided sham neurofeedback. They performed the same tasks as the other group, but the feedback came not from them, but from a random participant. By performing the exact same procedures with both groups using either real or sham neurofeedback, the researchers were able to distinguish the effect of real neurofeedback on control of the primary auditory cortex.

The study represents the first time that fMRI-neurofeedback training has been applied to demonstrate that there is a significant relationship between control of the primary auditory cortex and attentional processes. This result is important to therapeutic development, said Dr. Sherwood, because the neural mechanisms of tinnitus are unknown, but likely related to attention.

The results represent a promising avenue of research that could lead to improvements in other areas of health, like pain management, according to Dr. Sherwood. “Ultimately, we would like to take what we learned from MRI and develop a neurofeedback program that does not require MRI to use, such as an app or home-based therapy that could apply to tinnitus and other conditions,” he said.

Migraine Is Associated With High Sodium Levels in CSF

Migraineurs have significantly higher sodium concentrations in their CSF than people without migraine, according to the first study to use a technique called sodium MRI to examine patients with migraine.

Diagnosis of migraine is challenging, as the characteristics of migraines and the types of attacks vary widely among patients. Consequently, many patients with migraine are undiagnosed and untreated. Other patients, in contrast, are treated with medications for migraines even though they have a different type of headache, such as tension-type headache.

“It would be helpful to have a diagnostic tool supporting or even diagnosing migraine and differentiating migraine from all other types of headache,” said Melissa Meyer, MD, a radiology resident at the Institute of Clinical Radiology and Nuclear Medicine at University Hospital Mannheim and Heidelberg University in Heidelberg, Germany.

Dr. Meyer and colleagues explored a technique called cerebral sodium MRI as a possible means to help in the diagnosis and understanding of migraine. While MRI most often relies on protons to generate an image, sodium can be visualized as well. Research has shown that sodium plays an important role in brain chemistry.

The researchers recruited 12 women (mean age, 34) who had been clinically evaluated for migraine. The women filled out a questionnaire regarding the length, intensity, and frequency of their migraine attacks and accompanying auras. The researchers also enrolled 12 healthy women of similar age as a control group. Both groups underwent cerebral sodium MRI. Sodium concentrations of patients with migraine and healthy controls were compared and statistically analyzed.

The researchers found no significant differences between the two groups in sodium concentrations in the gray and white matter, brainstem, and cerebellum. Significant differences emerged, however, when the researchers looked at sodium concentrations in the CSF. Overall, sodium concentrations were significantly higher in the CSF of migraineurs than in healthy controls.

“These findings might facilitate the challenging diagnosis of a migraine,” said Dr. Meyer. The researchers hope to learn more about the connection between migraine and sodium in future studies. “As this was an exploratory study, we plan to examine more patients, preferably during or shortly after a migraine attack, for further validation.”

Gadolinium May Not Cause Neurologic Harm

There is no evidence that accumulation of gadolinium in the brain speeds cognitive decline, according to researchers.

“Approximately 400 million doses of gadolinium have been administered since 1988,” said Robert J. McDonald, MD, PhD, a neuroradiologist at the Mayo Clinic in Rochester, Minnesota. “Gadolinium contrast material is used in 40% to 50% of MRI scans performed today.”

Scientists previously believed that gadolinium contrast material could not cross the blood–brain barrier. Recent studies, however, including one by Dr. McDonald and colleagues, found that traces of gadolinium could be retained in the brain for years after MRI.

On September 8, 2017, the FDA recommended adding a warning about gadolinium retention in various organs, including the brain, to labels for gadolinium-based contrast agents used during MRI. The FDA highlighted several specific patient populations at greater risk, including children and pregnant women. Yet little is known about the health effects, if any, of gadolinium that is retained in the brain.

For this study, Dr. McDonald and colleagues set out to identify the neurotoxic potential of intracranial gadolinium deposition following IV administration of gadolinium-based contrast agents during MRI. The researchers used the Mayo Clinic Study of Aging (MCSA), the world’s largest prospective population-based cohort on aging, to study the effects of gadolinium exposure on neurologic and neurocognitive function.

All MCSA participants underwent extensive neurologic evaluation and neuropsychologic testing at baseline and 15-month follow-up intervals. Neurologic and neurocognitive scores were compared using standard methods between MCSA patients with no history of prior gadolinium exposure and those who had undergone prior MRI with gadolinium-based contrast agents. Progression from normal cognitive status to mild cognitive impairment and dementia was assessed using multistate Markov model analysis.

The study included 4,261 cognitively normal men and women between ages 50 and 90 (mean age, 72). Mean length of study participation was 3.7 years. Of the 4,261 participants, 1,092 (25.6%) had received one or more doses of gadolinium-based contrast agents, with at least one participant receiving as many as 28 prior doses. Median time since first gadolinium exposure was 5.6 years.

After adjusting for age, sex, education level, baseline neurocognitive performance, and other factors, gadolinium exposure was not a significant predictor of cognitive decline, dementia, diminished neuropsychologic performance, or diminished motor performance. No dose-related effects were observed among these metrics. Gadolinium exposure was not an independent risk factor in the rate of cognitive decline from normal cognitive status to dementia in this study group.

“There is concern over the safety of gadolinium-based contrast agents, particularly relating to gadolinium retention in the brain and other tissues,” said Dr. McDonald. “This study provides useful data that at the reasonable doses [that] 95% of the population is likely to receive in their lifetime, there is no evidence at this point that gadolinium retention in the brain is associated with adverse clinical outcomes.”

Traumatic brain injury (TBI) is a health concern for the U.S. Military Health System (MHS) as well as the VHA. It occurs in both deployed and nondeployed settings; however, Operation Enduring Freedom (OEF) and Operation Iraqi Freedom (OIF) and improved reporting mechanisms have dramatically increased TBI diagnoses in active-duty service members. According to the Defense and Veterans Brain Injury Center (DVBIC), more than 370,000 service members have been diagnosed with a TBI since 2000 (Figure).¹

Background

The DoD and the VA are collaborating on clinical research studies to identify, understand, and treat the long-term effects of TBI that can affect patients and their families. Most TBIs are mild (mTBIs), also called concussions, and patients typically recover within a few weeks (Table 1). However, some individuals with mTBI experience symptoms that may persist for months or years. A meta-analysis by Perry and colleagues showed that the prevalence or risk of a neurologic disorder, depression, or other mental health issue following mTBI was 67% higher compared with that in uninjured controls.²

Patients with any severity of TBI may require assistance with activities of daily living (ADLs), such as bathing, dressing, managing medications, and feeding. Patients also may need help with instrumental ADLs, such as meal preparation, grocery shopping, household chores, child care, getting to appointments or activities, coordination of educational and vocational services, financial and benefits management, and supportive listening.

Increased injuries have spurred the DoD and VA to coordinate health care to provide a seamless transition for patients between the 2 agencies. However, individuals who sustained a TBI may need various levels of caregiver assistance over time.

TBI and Caregivers

Despite better agency coordination for patients, caregivers can experience stress. Griffin and colleagues found that caregiving responsibilities can compete with other demands on the caregiver, such as work and family, and may negatively impact their health and finances.^3,4

Lou and colleagues studied the factors associated with caring for chronically ill family members that may result in stress for the caregivers.⁵ Along with an unaccounted for economic contribution, caregivers may face lost work time and pay and limitations on work travel and work advancement. Additionally, lost time for leisure, travel, social activities, family obligations, and retirement could result in physical and mental drain on the caregiver. Stress may reach a level at which the caregivers risk psychological distress. The study also noted that families with perceived high stress experience disrupted family functioning. Some TBI caregiver studies sought to understand how best to evaluate and determine the level of caregiver burden, and other studies investigated appropriate interventions.^6-9

Health care practitioners within the federal health care system may benefit from a greater awareness of caregiver needs and caregiver resources. Caregiver support can improve outcomes for both the caregiver and care recipient, and many organizations and resources already exist to assist the caregiver. This article reviews recent published literature on TBI caregivers of patients with TBI across civilian, military, and veteran populations and lists caregiver resources for additional information, assistance, and support.

Literature Review

The DVBIC defines the term caregiver as “any family or support person(s) relied upon by the service member or veteran with traumatic brain injury (TBI) who assumes primary responsibility for ensuring the needed level of care and overall well-being of that service member or veteran. A family or family caregiver may include spouse, parents, children, other extended family members, as well as significant others and friends.”³

In the following discussion, findings from military and veteran literature are separated from civilian population findings to highlight similarities and differences between these 2 bodies of research. Several of the studies in the military/veteran cohorts include polytrauma patients with comorbid physical and mental health issues not necessarily found in civilian literature.

Civilian Literature

A 2015 systematic review by Anderson and colleagues on coping and psychological adjustment in TBI caregivers indicated no Class I or Class II studies.¹⁰ Four Class III and 3 Class IV studies were found. The authors suggest that more rigorous studies (ie, Class I and II) are needed.

Despite these limitations, peer-reviewed literature indicates that the levels of stress and distress in TBI caregivers are consistent with reports for other diseases. In a civilian population, Carlozzi and colleagues found that TBI caregivers who reported stress, distress, anxiety, and feeling overwhelmed often had concerns for their social, emotional, physical, cognitive health, as well as feelings of loss.⁵ In addition, caregivers may need to take leaves of absence or leave the workforce entirely to provide for a family member or friend who had a TBI—often leading to financial strain (eg, depleting assets, accumulating debt). These challenges may occur during prime earning years, and the caregiver may lose the ability to resume work if the care receiver requires care for extended periods.¹¹

Kratz and colleagues showed that caregivers of individuals with moderate-to-severe TBI: (1) felt overburdened with responsibilities; (2) lacked personal time and time for self-care; (3) felt their lives were interrupted or lost; (4) grieved the loss of the person with TBI; and (5) endorsed anger, guilt, anxiety, and sadness.¹²

Perceptions differed between caregiver parents and caregiver partners. Parents expressed feelings of grief and sadness related to the “loss of the person before the TBI.” Parents also reported a sense of guilt and responsibility for their child’s TBI and feelings of being tied down to the individual with TBI. Parents experienced a greater level of stress if the son or daughter with TBI still lived at home. Partners expressed frustration and despair related to their role as sole decision maker and care provider. Partners’ distress also related to the partner relationship and the relationship between children and the individual with TBI.

Verhasghe and colleagues found that partners experience a greater degree of stress than do parents.¹³ Young families with minimal social support for coping with financial, psychiatric, and medical problems were the most vulnerable to stress. A systematic review by Ennis and colleagues evaluated depression and anxiety in caregiver parents vs spouses.¹⁴ Although methods and quality differed in the studies, findings indicated high levels of distress regardless of the type of caregiver.

Anderson and colleagues used the Ways of Coping Questionnaire to evaluate the association between coping and psychological adjustment in caregivers of TBI individuals.¹⁰ The use of emotion-focused coping and problem solving was possibly associated with psychological adjustment in caregivers. Verhasghe and colleagues indicated that the nature of the injuries more than the severity of TBI determined the level of stress up to 15 years after the TBI.¹³ Gender and social and professional support also influenced coping. The review identified the need to develop models of long-term support and care.

An Australian cohort of 79 family caregivers participated in a study by Perlesz and colleagues.¹⁵ Participants’ caregiving responsibilities averaged 19.3 months posttrauma. The Family Satisfaction Scale, Beck Depression Inventory, State Anxiety Inventory, and Profile of Mood States were used in this analysis. Male caregivers reported distress in terms of anger and fatigue; female caregivers were at greatest risk of poor psychosocial outcomes. Although findings from primary caregivers indicated that 35% to 49% displayed enough distress to warrant clinical intervention, between 51% and 80% were not psychologically distressed and were satisfied with their families. Data supported previous reports suggesting caregivers are “not universally distressed.”¹⁵

Manskow and colleagues followed patients with severe TBI and assessed caregiver burden 1 year later. Using the Caregiver Burden Scale, caregivers reported the highest scores (N = 92) on the General Strain Index followed by the Disappointment Index.¹⁶ Bayen and colleagues also studied caregivers of severe TBI patients.¹⁷ Objective and subjective caregiver burden data 4 years later indicated 44% of caregivers (N = 98) reported multidimensional burden. Greater burden was associated in caring for individuals who had poorer Glasgow Outcome Scale Extended scores and more severe cognitive disorders.

Military and Veteran Literature

Griffin and colleagues conducted the Family and Caregiver Experience Study (FACES) with caregivers (N = 564) of service members who incurred a TBI.³ According to the caregivers, two-thirds of the patients lost consciousness for more than 30 minutes, which was followed by inpatient rehabilitation care at a VA polytrauma center between 2001 and 2009. The majority of caregivers of TBI patients were female (79%) and aged < 60 years (84%). Parents comprised 62% and spouses 32% of the cohort. Caregivers tended to have some level of education beyond high school (73%), were married (77%), either worked or were enrolled in school (55%), and earned less than $40,000 a year (70%). Common characteristics of the care receivers were male gender (95%), average age 30, high school educated (52%), married (almost 50%), and employed (50%). Forty-five percent of the care receivers were injured 4 to 6 years prior, and 12% were injured 7 or more years prior. The study determined the caregivers’ perception of intensity of care needed and indicated that families as well as clinicians need to plan for some level of long-term support and services.

In addition to the TBI-related caregiving needs, Griffin and colleagues found in a military population that other medical conditions impacted the level of caregiving and strained a marriage.¹⁸ Their study found that in a military population between 30% and 50% of marriages of patients with TBI dissolved within the first 10 years after injury. Caregivers may need to learn nursing activities, such as tube feedings, tracheostomy and stoma care, catheter care, wound care, and medication administration. Family stress with caregiving may interfere with the ability to understand information related to the care receivers’ medical care and may require multiple formats to explain care needs. Sander and colleagues associated better emotional functioning in caregivers with greater social integration and occupation outcomes in patients at the postacute rehabilitation program phase (within 6 months of injury).¹⁹ However, these outcomes did not continue more than 6 months postinjury.

Intervention and Research Studies

Powell and colleagues used a telephone-based, individualized TBI education intervention along with problem-solving mentoring (10 phone calls at 2-week intervals following patient discharge for moderate-to-severe TBI from a level 1 trauma center) to determine which programs, activities, and coping strategies could decrease caregiver challenges.²⁰ The telephone interventions resulted in better caregiver outcomes than usual care as measured by composite scores on the Bakas Caregiving Outcomes Scale (BCOS) and the Brief Symptom Inventory (BSI-18) at 6 months post-TBI survivor discharge. Dyer and colleagues explored Internet approaches and mobile applications to provide support for caregivers. ¹⁸ In a small sample of 10 caregivers, Damianakis and colleagues conducted a 10-session pilot videoconferencing support-group intervention program led by a clinician. Results indicated that the intervention enhanced caregiver coping and problem-solving skills.⁷

Petranovich and colleagues examined the efficacy of counselor-assisted problem-solving interventions in improving long-term caregiver psychological functioning following TBI in adolescents.²¹ Their findings support the utility of online interventions in improving long-term caregiver psychological distress, particularly for lower income families. Although this study focused on adolescents, research may indicate merit in an adult population. In relatives of patients with severe TBI, Norup and colleagues associated improvements in health-related quality of life (HRQOL) with improvements in symptoms of anxiety and depression without specific intervention.²²

Moriarty and colleagues conducted a randomized controlled trial for veterans who received care at a VA polytrauma center and their family members who participated in a veteran’s in-home program (VIP) intervention.⁹ The study aimed to evaluate how VIP affected family members’ caregiver burden, depressive symptoms, satisfaction with caregiving, and the program’s acceptability. Eighty-one veterans with a key family member were randomized. Of those, 63 veterans completed a follow-up interview. The intervention consisted of 6 home visits of 1 to 2 hours each and 2 telephone calls from an occupational therapist over 3 to 4 months. Family members were invited to participate during the home visits. The control group received usual clinic care with 2 telephone calls during the study period. All participants received the follow-up interview 3 to 4 months after baseline interviews. The severity of TBI was determined by a review of the electronic medical record using the VA/DoD Clinical Practice Guidelines. Findings of this study indicated that family members in the intervention group showed significantly lower depressive symptom scores and caregiver burden scores.⁹ Additionally, the veterans in the intervention group exhibited higher community integration and ability to manage their targeted outcomes. Further research may indicate that VIP could assist patients with TBI and caregivers in an active-duty population.

The DVBIC is the executive agent for a congressionally mandated 15-year longitudinal study on TBI incurred by members of the armed services in OEF and OIF. The John Warner National Defense Authorization Act for Fiscal Year 2007 outlined the study. An initial finding identified the need for an HRQOL outcomes assessment specific to TBI caregivers.²³ Having these data will allow investigators to fully determine the comprehensive impact of caring for a person who sustained a mild, moderate, severe, or penetrating TBI and to evaluate the effectiveness of interventions designed to address caregivers’ needs. To date, the study has identified the following HRQOL themes generated among caregivers: social health, emotional health, physical/medical health, cognitive functioning, and feelings of loss (related to changing social roles). Carlozzi and colleagues noted that the study also aimed to identify a sensitive outcome measure to evaluate quality of life in the caregivers over time.⁷

Knowledge Gaps

Ongoing studies focus on caregiving for individuals with various illnesses and needs. Some of the information in each study may be beneficial to TBI caregivers who are not fully aware of resources and interventions. For example, Fortune and colleagues, Hirano and colleagues, and Grover and colleagues are studying caregiver activities involving other diseases to determine, more generally, which programs, activities, and coping strategies can decrease caregiver challenges.^24-26 Further, understanding and addressing the needs of these families over many years will provide data that could inform policy, benefits, resources, and needed services (such as the Caregivers and Veterans Omnibus Health Services Act of 2010) and assist with family resilience efforts, including understanding and enhancing family protective and recovery factors.

As studies have indicated, some families do not report family distress when providing care to an individual with TBI. Understanding the factors that influence positive family adjustment is important to capture and perhaps replicate in future studies so that they can lead to effective treatment interventions. Although this review does not discuss caregiver needs for patients with TBI with disorders of consciousness that require more care than most caregivers can provide in the home setting, caregiving for this population deserves attention in future studies. Furthermore, an area that has not received much attention is the impact on children in the household. Children aged < 18 years can assist not only in the care of a disabled adult, but also of younger siblings; also they can help with household activities from housekeeping to meal preparation. Children also may provide physical and emotional support.

The impact of aging caregivers and subsequent needs for their own care as well as the person(s) they are providing care for has not been fully addressed. Areas requiring more research include both the aging caregiver taking care of an aging spouse or relative and the aging parent taking care of a young adult or child. Along with aging, the issue of long-term caregiving needs further development. For example, how do the differences between access to services between caregivers of adults with TBI in the military and those in the civilian sector impact the family/caregiver? Further research may answer questions such as:

• Which tools are most useful in evaluating and determining caregiver stress and burden?
• Are the needs of military and veteran caregivers unique?
• Do polytrauma patients with comorbid diagnoses have unique caregiver needs and trajectories?
• Do TBI caregiver stressors differ from stressors related to other medical conditions or chronic diseases?
• Is there a need for military and veteran TBI-specific caregiver programs?
• Which interventions best help caregivers and for how long?
• Should the approach to intervention depend on variables such as age and gender of the caregivers or relationship to the patient with a TBI (eg, spouse vs parent)?

Methods or processes to inform and update caregivers about available resources also are critically needed. Also, Sabab and colleagues noted the importance of research on the effects of denial as it relates to cognitive, emotional, social impact.²⁷ Denial may impact delays in treatments.

Resource

Many national, state, local, and grassroots organizations provide information and support for persons with illness and/or disabilities. Most clinicians of neurologic, mental health, and cancer have developed various forms of support interventions for those with the disease and their caregivers (Table 2). Highlighted in this section are a few organizations that specifically provide resources for caregivers caring for active-duty service members or veterans with a TBI.

Although a caregiver generally does not receive money from an outside source for services, the DoD may consider the caregiver as a nonmedical attendant for an active-duty service member and provide a temporary stipend. The VA provides several support and service options for caregivers under the Caregiver Support Program, through which more than 300 VA health care professionals provide support to caregivers. The Caregivers and Veterans Omnibus Health Services Act of 2010 authorizes the VA to provide additional VA services for seriously injured post-9/11 veterans and their family caregivers through the Program of Comprehensive Assistance for Family Caregivers (VA Caregiver Support Program). After meeting eligibility criteria, primary caregivers of post-9/11 veterans may receive a monthly stipend (based on the level of care needed) as well as comprehensive caregiver training, referral services, access to health care insurance, mental health services, counseling, and respite care. The Caregiver Support Program offers a toll-free support line and a 24-hour crisis hot line.

In 2014, the Government Accountability Office (GAO) outlined the VA health care improvements needed to manage the demand for the Caregiver Support Program, which are established at VA medical centers.²⁸ The GAO reported that the “VA significantly underestimated caregivers’ demand for services… larger than expected workloads and …delays in approval determinations” with about 500 approved caregivers who are added to the program each month. Original estimates indicated that about 4,000 caregivers would be approved by September 2014; however, by May 2014 about 15,600 caregivers were approved.

In addition to the VA Caregiver Support Program, a variety of state, local, and nonprofit organizations offer support for caregivers. Established in 2012, the Elizabeth Dole Foundation’s program Caring for Military Families “assists caregivers by raising awareness of the caregiver role, leveraging resources and partnerships to provide support, and identifying best practices and solutions to address the challenges caregivers face.” The foundation commissioned the RAND Corporation to “describe the magnitude of military caregiving in the United States, and to identify gaps in programs, policies, and services.” The 2014 RAND report estimated that among the 5.5 million military caregivers in the U.S., 1 million (19.6%) cared for post-9/11 veterans.²⁹ The military caregivers consistently experienced poorer health outcomes, greater strains on family relationships, and more workplace problems than noncaregivers; post-9/11 military caregivers fared worse in those areas.

The Elizabeth Dole Foundation, Hidden Heroes Impact Council Forum advocates for caregiver empowerment, cultural competency awareness, and better policies, programs, and services. The council focuses its efforts on key impact: community support at home, education and training, employment and workplace support, financial and legal issues, interfaith action and ministry council, mental and physical health, and respite care. It aims to raise the money to build awareness and support for military and veterans’ caregivers. The Military and Veteran Caregiver Network is another Elizabeth Dole Foundation initiative. It is an online forum community, peer support group, and peer mentor program structure. A resource library for referrals to local services also is available.

A variety of other organizations, such as United Service Organizations; Easter Seals; Team Red, White and Blue; Operation Homefront; Blue Star Families; state Brain Injury Associations; and support groups for TBI at local hospitals and community centers provide resources to both patients and caregivers. Organizations for caregivers not exclusive to TBI patients include the Caregiver Action Network (formerly National Family Caregiver Association) and the Family Caregiver Alliance. The National Family Caregivers Support Program provides grants to states and territories to develop and provide supportive services to caregivers. Some training for caregivers could include long-term financial planning, legal issues, residential and educational planning, caregiver stress management, the benefits of utilizing support resources, and actions and behaviors that enhance coping strategies. In 2007, DVBIC developed The Traumatic Brain Injury Guide for Caregivers of Service Members and Veterans, which is intended for family caregivers assisting a service member or veteran who sustained a moderate or severe TBI.⁶ A recent assessment determined the need to update the guide. The Center of Excellence for Medical Multimedia is another source of information for caregivers.

Conclusion

The recent combat conflicts of OEF and OIF have resulted in a dramatic increase in the occurrence of TBI injuries in active-duty service members both in theater and stateside and have highlighted the need for some service members and veterans with a TBI to require ongoing assistance from a caregiver. The levels of assistance and length of time vary greatly, impacted by the severity of the TBI and psychosocial situations.

In response to elevated awareness, several programs and resources have been developed or enhanced to address the specific needs of caregivers. Certain programs and resources are specific for caregivers of military service members and veterans, whereas others benefit caregivers in general. Likewise, some programs are not specific to individuals with TBI.

Caregivers assume many roles in their efforts to support the person with a TBI. They may need to dramatically adjust their lives to serve as a caregiver. Providing adequate resources for the caregivers impacts their ability to continue providing care. Thus, awareness of and access to resources play a critical role in helping to reduce stress, distress, burden (eg, physical, emotional, and financial), and caregiver burnout. Programs and resources often change, making it difficult for health care practitioners to know which programs offer what or even whether they still exist. Therefore, the authors synthesized the current medical literature of the topic of TBI and their caregiver needs as well as current resources for additional information and support.

Ongoing research studies, such as the congressionally mandated 15-year longitudinal study, are examining the impact of caregiving in the military and veteran communities. Future research could identify specific needs of military caregivers, identify gaps in services or programs, and identify interventions that promote resilience. Moreover, research directed at military and veteran caregivers can promote change that will benefit the general population of caregivers. It will be important for health care practitioners to keep abreast of new findings and information to incorporate into care plans for their patients who have had a TBI and their families.

Traumatic brain injury (TBI) is a health concern for the U.S. Military Health System (MHS) as well as the VHA. It occurs in both deployed and nondeployed settings; however, Operation Enduring Freedom (OEF) and Operation Iraqi Freedom (OIF) and improved reporting mechanisms have dramatically increased TBI diagnoses in active-duty service members. According to the Defense and Veterans Brain Injury Center (DVBIC), more than 370,000 service members have been diagnosed with a TBI since 2000 (Figure).¹

Background

The DoD and the VA are collaborating on clinical research studies to identify, understand, and treat the long-term effects of TBI that can affect patients and their families. Most TBIs are mild (mTBIs), also called concussions, and patients typically recover within a few weeks (Table 1). However, some individuals with mTBI experience symptoms that may persist for months or years. A meta-analysis by Perry and colleagues showed that the prevalence or risk of a neurologic disorder, depression, or other mental health issue following mTBI was 67% higher compared with that in uninjured controls.²

Patients with any severity of TBI may require assistance with activities of daily living (ADLs), such as bathing, dressing, managing medications, and feeding. Patients also may need help with instrumental ADLs, such as meal preparation, grocery shopping, household chores, child care, getting to appointments or activities, coordination of educational and vocational services, financial and benefits management, and supportive listening.

Increased injuries have spurred the DoD and VA to coordinate health care to provide a seamless transition for patients between the 2 agencies. However, individuals who sustained a TBI may need various levels of caregiver assistance over time.

TBI and Caregivers

Despite better agency coordination for patients, caregivers can experience stress. Griffin and colleagues found that caregiving responsibilities can compete with other demands on the caregiver, such as work and family, and may negatively impact their health and finances.^3,4

Lou and colleagues studied the factors associated with caring for chronically ill family members that may result in stress for the caregivers.⁵ Along with an unaccounted for economic contribution, caregivers may face lost work time and pay and limitations on work travel and work advancement. Additionally, lost time for leisure, travel, social activities, family obligations, and retirement could result in physical and mental drain on the caregiver. Stress may reach a level at which the caregivers risk psychological distress. The study also noted that families with perceived high stress experience disrupted family functioning. Some TBI caregiver studies sought to understand how best to evaluate and determine the level of caregiver burden, and other studies investigated appropriate interventions.^6-9

Health care practitioners within the federal health care system may benefit from a greater awareness of caregiver needs and caregiver resources. Caregiver support can improve outcomes for both the caregiver and care recipient, and many organizations and resources already exist to assist the caregiver. This article reviews recent published literature on TBI caregivers of patients with TBI across civilian, military, and veteran populations and lists caregiver resources for additional information, assistance, and support.

Literature Review

The DVBIC defines the term caregiver as “any family or support person(s) relied upon by the service member or veteran with traumatic brain injury (TBI) who assumes primary responsibility for ensuring the needed level of care and overall well-being of that service member or veteran. A family or family caregiver may include spouse, parents, children, other extended family members, as well as significant others and friends.”³

In the following discussion, findings from military and veteran literature are separated from civilian population findings to highlight similarities and differences between these 2 bodies of research. Several of the studies in the military/veteran cohorts include polytrauma patients with comorbid physical and mental health issues not necessarily found in civilian literature.

Civilian Literature

A 2015 systematic review by Anderson and colleagues on coping and psychological adjustment in TBI caregivers indicated no Class I or Class II studies.¹⁰ Four Class III and 3 Class IV studies were found. The authors suggest that more rigorous studies (ie, Class I and II) are needed.

Despite these limitations, peer-reviewed literature indicates that the levels of stress and distress in TBI caregivers are consistent with reports for other diseases. In a civilian population, Carlozzi and colleagues found that TBI caregivers who reported stress, distress, anxiety, and feeling overwhelmed often had concerns for their social, emotional, physical, cognitive health, as well as feelings of loss.⁵ In addition, caregivers may need to take leaves of absence or leave the workforce entirely to provide for a family member or friend who had a TBI—often leading to financial strain (eg, depleting assets, accumulating debt). These challenges may occur during prime earning years, and the caregiver may lose the ability to resume work if the care receiver requires care for extended periods.¹¹

Kratz and colleagues showed that caregivers of individuals with moderate-to-severe TBI: (1) felt overburdened with responsibilities; (2) lacked personal time and time for self-care; (3) felt their lives were interrupted or lost; (4) grieved the loss of the person with TBI; and (5) endorsed anger, guilt, anxiety, and sadness.¹²

Perceptions differed between caregiver parents and caregiver partners. Parents expressed feelings of grief and sadness related to the “loss of the person before the TBI.” Parents also reported a sense of guilt and responsibility for their child’s TBI and feelings of being tied down to the individual with TBI. Parents experienced a greater level of stress if the son or daughter with TBI still lived at home. Partners expressed frustration and despair related to their role as sole decision maker and care provider. Partners’ distress also related to the partner relationship and the relationship between children and the individual with TBI.

Verhasghe and colleagues found that partners experience a greater degree of stress than do parents.¹³ Young families with minimal social support for coping with financial, psychiatric, and medical problems were the most vulnerable to stress. A systematic review by Ennis and colleagues evaluated depression and anxiety in caregiver parents vs spouses.¹⁴ Although methods and quality differed in the studies, findings indicated high levels of distress regardless of the type of caregiver.

Anderson and colleagues used the Ways of Coping Questionnaire to evaluate the association between coping and psychological adjustment in caregivers of TBI individuals.¹⁰ The use of emotion-focused coping and problem solving was possibly associated with psychological adjustment in caregivers. Verhasghe and colleagues indicated that the nature of the injuries more than the severity of TBI determined the level of stress up to 15 years after the TBI.¹³ Gender and social and professional support also influenced coping. The review identified the need to develop models of long-term support and care.

An Australian cohort of 79 family caregivers participated in a study by Perlesz and colleagues.¹⁵ Participants’ caregiving responsibilities averaged 19.3 months posttrauma. The Family Satisfaction Scale, Beck Depression Inventory, State Anxiety Inventory, and Profile of Mood States were used in this analysis. Male caregivers reported distress in terms of anger and fatigue; female caregivers were at greatest risk of poor psychosocial outcomes. Although findings from primary caregivers indicated that 35% to 49% displayed enough distress to warrant clinical intervention, between 51% and 80% were not psychologically distressed and were satisfied with their families. Data supported previous reports suggesting caregivers are “not universally distressed.”¹⁵

Manskow and colleagues followed patients with severe TBI and assessed caregiver burden 1 year later. Using the Caregiver Burden Scale, caregivers reported the highest scores (N = 92) on the General Strain Index followed by the Disappointment Index.¹⁶ Bayen and colleagues also studied caregivers of severe TBI patients.¹⁷ Objective and subjective caregiver burden data 4 years later indicated 44% of caregivers (N = 98) reported multidimensional burden. Greater burden was associated in caring for individuals who had poorer Glasgow Outcome Scale Extended scores and more severe cognitive disorders.

Military and Veteran Literature

Griffin and colleagues conducted the Family and Caregiver Experience Study (FACES) with caregivers (N = 564) of service members who incurred a TBI.³ According to the caregivers, two-thirds of the patients lost consciousness for more than 30 minutes, which was followed by inpatient rehabilitation care at a VA polytrauma center between 2001 and 2009. The majority of caregivers of TBI patients were female (79%) and aged < 60 years (84%). Parents comprised 62% and spouses 32% of the cohort. Caregivers tended to have some level of education beyond high school (73%), were married (77%), either worked or were enrolled in school (55%), and earned less than $40,000 a year (70%). Common characteristics of the care receivers were male gender (95%), average age 30, high school educated (52%), married (almost 50%), and employed (50%). Forty-five percent of the care receivers were injured 4 to 6 years prior, and 12% were injured 7 or more years prior. The study determined the caregivers’ perception of intensity of care needed and indicated that families as well as clinicians need to plan for some level of long-term support and services.

In addition to the TBI-related caregiving needs, Griffin and colleagues found in a military population that other medical conditions impacted the level of caregiving and strained a marriage.¹⁸ Their study found that in a military population between 30% and 50% of marriages of patients with TBI dissolved within the first 10 years after injury. Caregivers may need to learn nursing activities, such as tube feedings, tracheostomy and stoma care, catheter care, wound care, and medication administration. Family stress with caregiving may interfere with the ability to understand information related to the care receivers’ medical care and may require multiple formats to explain care needs. Sander and colleagues associated better emotional functioning in caregivers with greater social integration and occupation outcomes in patients at the postacute rehabilitation program phase (within 6 months of injury).¹⁹ However, these outcomes did not continue more than 6 months postinjury.

Intervention and Research Studies

Powell and colleagues used a telephone-based, individualized TBI education intervention along with problem-solving mentoring (10 phone calls at 2-week intervals following patient discharge for moderate-to-severe TBI from a level 1 trauma center) to determine which programs, activities, and coping strategies could decrease caregiver challenges.²⁰ The telephone interventions resulted in better caregiver outcomes than usual care as measured by composite scores on the Bakas Caregiving Outcomes Scale (BCOS) and the Brief Symptom Inventory (BSI-18) at 6 months post-TBI survivor discharge. Dyer and colleagues explored Internet approaches and mobile applications to provide support for caregivers. ¹⁸ In a small sample of 10 caregivers, Damianakis and colleagues conducted a 10-session pilot videoconferencing support-group intervention program led by a clinician. Results indicated that the intervention enhanced caregiver coping and problem-solving skills.⁷

Petranovich and colleagues examined the efficacy of counselor-assisted problem-solving interventions in improving long-term caregiver psychological functioning following TBI in adolescents.²¹ Their findings support the utility of online interventions in improving long-term caregiver psychological distress, particularly for lower income families. Although this study focused on adolescents, research may indicate merit in an adult population. In relatives of patients with severe TBI, Norup and colleagues associated improvements in health-related quality of life (HRQOL) with improvements in symptoms of anxiety and depression without specific intervention.²²

Moriarty and colleagues conducted a randomized controlled trial for veterans who received care at a VA polytrauma center and their family members who participated in a veteran’s in-home program (VIP) intervention.⁹ The study aimed to evaluate how VIP affected family members’ caregiver burden, depressive symptoms, satisfaction with caregiving, and the program’s acceptability. Eighty-one veterans with a key family member were randomized. Of those, 63 veterans completed a follow-up interview. The intervention consisted of 6 home visits of 1 to 2 hours each and 2 telephone calls from an occupational therapist over 3 to 4 months. Family members were invited to participate during the home visits. The control group received usual clinic care with 2 telephone calls during the study period. All participants received the follow-up interview 3 to 4 months after baseline interviews. The severity of TBI was determined by a review of the electronic medical record using the VA/DoD Clinical Practice Guidelines. Findings of this study indicated that family members in the intervention group showed significantly lower depressive symptom scores and caregiver burden scores.⁹ Additionally, the veterans in the intervention group exhibited higher community integration and ability to manage their targeted outcomes. Further research may indicate that VIP could assist patients with TBI and caregivers in an active-duty population.

The DVBIC is the executive agent for a congressionally mandated 15-year longitudinal study on TBI incurred by members of the armed services in OEF and OIF. The John Warner National Defense Authorization Act for Fiscal Year 2007 outlined the study. An initial finding identified the need for an HRQOL outcomes assessment specific to TBI caregivers.²³ Having these data will allow investigators to fully determine the comprehensive impact of caring for a person who sustained a mild, moderate, severe, or penetrating TBI and to evaluate the effectiveness of interventions designed to address caregivers’ needs. To date, the study has identified the following HRQOL themes generated among caregivers: social health, emotional health, physical/medical health, cognitive functioning, and feelings of loss (related to changing social roles). Carlozzi and colleagues noted that the study also aimed to identify a sensitive outcome measure to evaluate quality of life in the caregivers over time.⁷

Knowledge Gaps

Ongoing studies focus on caregiving for individuals with various illnesses and needs. Some of the information in each study may be beneficial to TBI caregivers who are not fully aware of resources and interventions. For example, Fortune and colleagues, Hirano and colleagues, and Grover and colleagues are studying caregiver activities involving other diseases to determine, more generally, which programs, activities, and coping strategies can decrease caregiver challenges.^24-26 Further, understanding and addressing the needs of these families over many years will provide data that could inform policy, benefits, resources, and needed services (such as the Caregivers and Veterans Omnibus Health Services Act of 2010) and assist with family resilience efforts, including understanding and enhancing family protective and recovery factors.

As studies have indicated, some families do not report family distress when providing care to an individual with TBI. Understanding the factors that influence positive family adjustment is important to capture and perhaps replicate in future studies so that they can lead to effective treatment interventions. Although this review does not discuss caregiver needs for patients with TBI with disorders of consciousness that require more care than most caregivers can provide in the home setting, caregiving for this population deserves attention in future studies. Furthermore, an area that has not received much attention is the impact on children in the household. Children aged < 18 years can assist not only in the care of a disabled adult, but also of younger siblings; also they can help with household activities from housekeeping to meal preparation. Children also may provide physical and emotional support.

The impact of aging caregivers and subsequent needs for their own care as well as the person(s) they are providing care for has not been fully addressed. Areas requiring more research include both the aging caregiver taking care of an aging spouse or relative and the aging parent taking care of a young adult or child. Along with aging, the issue of long-term caregiving needs further development. For example, how do the differences between access to services between caregivers of adults with TBI in the military and those in the civilian sector impact the family/caregiver? Further research may answer questions such as:

• Which tools are most useful in evaluating and determining caregiver stress and burden?
• Are the needs of military and veteran caregivers unique?
• Do polytrauma patients with comorbid diagnoses have unique caregiver needs and trajectories?
• Do TBI caregiver stressors differ from stressors related to other medical conditions or chronic diseases?
• Is there a need for military and veteran TBI-specific caregiver programs?
• Which interventions best help caregivers and for how long?
• Should the approach to intervention depend on variables such as age and gender of the caregivers or relationship to the patient with a TBI (eg, spouse vs parent)?

Methods or processes to inform and update caregivers about available resources also are critically needed. Also, Sabab and colleagues noted the importance of research on the effects of denial as it relates to cognitive, emotional, social impact.²⁷ Denial may impact delays in treatments.

Resource

Many national, state, local, and grassroots organizations provide information and support for persons with illness and/or disabilities. Most clinicians of neurologic, mental health, and cancer have developed various forms of support interventions for those with the disease and their caregivers (Table 2). Highlighted in this section are a few organizations that specifically provide resources for caregivers caring for active-duty service members or veterans with a TBI.

Although a caregiver generally does not receive money from an outside source for services, the DoD may consider the caregiver as a nonmedical attendant for an active-duty service member and provide a temporary stipend. The VA provides several support and service options for caregivers under the Caregiver Support Program, through which more than 300 VA health care professionals provide support to caregivers. The Caregivers and Veterans Omnibus Health Services Act of 2010 authorizes the VA to provide additional VA services for seriously injured post-9/11 veterans and their family caregivers through the Program of Comprehensive Assistance for Family Caregivers (VA Caregiver Support Program). After meeting eligibility criteria, primary caregivers of post-9/11 veterans may receive a monthly stipend (based on the level of care needed) as well as comprehensive caregiver training, referral services, access to health care insurance, mental health services, counseling, and respite care. The Caregiver Support Program offers a toll-free support line and a 24-hour crisis hot line.

In 2014, the Government Accountability Office (GAO) outlined the VA health care improvements needed to manage the demand for the Caregiver Support Program, which are established at VA medical centers.²⁸ The GAO reported that the “VA significantly underestimated caregivers’ demand for services… larger than expected workloads and …delays in approval determinations” with about 500 approved caregivers who are added to the program each month. Original estimates indicated that about 4,000 caregivers would be approved by September 2014; however, by May 2014 about 15,600 caregivers were approved.

In addition to the VA Caregiver Support Program, a variety of state, local, and nonprofit organizations offer support for caregivers. Established in 2012, the Elizabeth Dole Foundation’s program Caring for Military Families “assists caregivers by raising awareness of the caregiver role, leveraging resources and partnerships to provide support, and identifying best practices and solutions to address the challenges caregivers face.” The foundation commissioned the RAND Corporation to “describe the magnitude of military caregiving in the United States, and to identify gaps in programs, policies, and services.” The 2014 RAND report estimated that among the 5.5 million military caregivers in the U.S., 1 million (19.6%) cared for post-9/11 veterans.²⁹ The military caregivers consistently experienced poorer health outcomes, greater strains on family relationships, and more workplace problems than noncaregivers; post-9/11 military caregivers fared worse in those areas.

The Elizabeth Dole Foundation, Hidden Heroes Impact Council Forum advocates for caregiver empowerment, cultural competency awareness, and better policies, programs, and services. The council focuses its efforts on key impact: community support at home, education and training, employment and workplace support, financial and legal issues, interfaith action and ministry council, mental and physical health, and respite care. It aims to raise the money to build awareness and support for military and veterans’ caregivers. The Military and Veteran Caregiver Network is another Elizabeth Dole Foundation initiative. It is an online forum community, peer support group, and peer mentor program structure. A resource library for referrals to local services also is available.

A variety of other organizations, such as United Service Organizations; Easter Seals; Team Red, White and Blue; Operation Homefront; Blue Star Families; state Brain Injury Associations; and support groups for TBI at local hospitals and community centers provide resources to both patients and caregivers. Organizations for caregivers not exclusive to TBI patients include the Caregiver Action Network (formerly National Family Caregiver Association) and the Family Caregiver Alliance. The National Family Caregivers Support Program provides grants to states and territories to develop and provide supportive services to caregivers. Some training for caregivers could include long-term financial planning, legal issues, residential and educational planning, caregiver stress management, the benefits of utilizing support resources, and actions and behaviors that enhance coping strategies. In 2007, DVBIC developed The Traumatic Brain Injury Guide for Caregivers of Service Members and Veterans, which is intended for family caregivers assisting a service member or veteran who sustained a moderate or severe TBI.⁶ A recent assessment determined the need to update the guide. The Center of Excellence for Medical Multimedia is another source of information for caregivers.

Conclusion

The recent combat conflicts of OEF and OIF have resulted in a dramatic increase in the occurrence of TBI injuries in active-duty service members both in theater and stateside and have highlighted the need for some service members and veterans with a TBI to require ongoing assistance from a caregiver. The levels of assistance and length of time vary greatly, impacted by the severity of the TBI and psychosocial situations.

In response to elevated awareness, several programs and resources have been developed or enhanced to address the specific needs of caregivers. Certain programs and resources are specific for caregivers of military service members and veterans, whereas others benefit caregivers in general. Likewise, some programs are not specific to individuals with TBI.

Caregivers assume many roles in their efforts to support the person with a TBI. They may need to dramatically adjust their lives to serve as a caregiver. Providing adequate resources for the caregivers impacts their ability to continue providing care. Thus, awareness of and access to resources play a critical role in helping to reduce stress, distress, burden (eg, physical, emotional, and financial), and caregiver burnout. Programs and resources often change, making it difficult for health care practitioners to know which programs offer what or even whether they still exist. Therefore, the authors synthesized the current medical literature of the topic of TBI and their caregiver needs as well as current resources for additional information and support.

Ongoing research studies, such as the congressionally mandated 15-year longitudinal study, are examining the impact of caregiving in the military and veteran communities. Future research could identify specific needs of military caregivers, identify gaps in services or programs, and identify interventions that promote resilience. Moreover, research directed at military and veteran caregivers can promote change that will benefit the general population of caregivers. It will be important for health care practitioners to keep abreast of new findings and information to incorporate into care plans for their patients who have had a TBI and their families.

Traumatic brain injury (TBI) is a health concern for the U.S. Military Health System (MHS) as well as the VHA. It occurs in both deployed and nondeployed settings; however, Operation Enduring Freedom (OEF) and Operation Iraqi Freedom (OIF) and improved reporting mechanisms have dramatically increased TBI diagnoses in active-duty service members. According to the Defense and Veterans Brain Injury Center (DVBIC), more than 370,000 service members have been diagnosed with a TBI since 2000 (Figure).¹

Background

The DoD and the VA are collaborating on clinical research studies to identify, understand, and treat the long-term effects of TBI that can affect patients and their families. Most TBIs are mild (mTBIs), also called concussions, and patients typically recover within a few weeks (Table 1). However, some individuals with mTBI experience symptoms that may persist for months or years. A meta-analysis by Perry and colleagues showed that the prevalence or risk of a neurologic disorder, depression, or other mental health issue following mTBI was 67% higher compared with that in uninjured controls.²

Patients with any severity of TBI may require assistance with activities of daily living (ADLs), such as bathing, dressing, managing medications, and feeding. Patients also may need help with instrumental ADLs, such as meal preparation, grocery shopping, household chores, child care, getting to appointments or activities, coordination of educational and vocational services, financial and benefits management, and supportive listening.

Increased injuries have spurred the DoD and VA to coordinate health care to provide a seamless transition for patients between the 2 agencies. However, individuals who sustained a TBI may need various levels of caregiver assistance over time.

TBI and Caregivers

Despite better agency coordination for patients, caregivers can experience stress. Griffin and colleagues found that caregiving responsibilities can compete with other demands on the caregiver, such as work and family, and may negatively impact their health and finances.^3,4

Lou and colleagues studied the factors associated with caring for chronically ill family members that may result in stress for the caregivers.⁵ Along with an unaccounted for economic contribution, caregivers may face lost work time and pay and limitations on work travel and work advancement. Additionally, lost time for leisure, travel, social activities, family obligations, and retirement could result in physical and mental drain on the caregiver. Stress may reach a level at which the caregivers risk psychological distress. The study also noted that families with perceived high stress experience disrupted family functioning. Some TBI caregiver studies sought to understand how best to evaluate and determine the level of caregiver burden, and other studies investigated appropriate interventions.^6-9

Health care practitioners within the federal health care system may benefit from a greater awareness of caregiver needs and caregiver resources. Caregiver support can improve outcomes for both the caregiver and care recipient, and many organizations and resources already exist to assist the caregiver. This article reviews recent published literature on TBI caregivers of patients with TBI across civilian, military, and veteran populations and lists caregiver resources for additional information, assistance, and support.

Literature Review

The DVBIC defines the term caregiver as “any family or support person(s) relied upon by the service member or veteran with traumatic brain injury (TBI) who assumes primary responsibility for ensuring the needed level of care and overall well-being of that service member or veteran. A family or family caregiver may include spouse, parents, children, other extended family members, as well as significant others and friends.”³

In the following discussion, findings from military and veteran literature are separated from civilian population findings to highlight similarities and differences between these 2 bodies of research. Several of the studies in the military/veteran cohorts include polytrauma patients with comorbid physical and mental health issues not necessarily found in civilian literature.

Civilian Literature

A 2015 systematic review by Anderson and colleagues on coping and psychological adjustment in TBI caregivers indicated no Class I or Class II studies.¹⁰ Four Class III and 3 Class IV studies were found. The authors suggest that more rigorous studies (ie, Class I and II) are needed.

Despite these limitations, peer-reviewed literature indicates that the levels of stress and distress in TBI caregivers are consistent with reports for other diseases. In a civilian population, Carlozzi and colleagues found that TBI caregivers who reported stress, distress, anxiety, and feeling overwhelmed often had concerns for their social, emotional, physical, cognitive health, as well as feelings of loss.⁵ In addition, caregivers may need to take leaves of absence or leave the workforce entirely to provide for a family member or friend who had a TBI—often leading to financial strain (eg, depleting assets, accumulating debt). These challenges may occur during prime earning years, and the caregiver may lose the ability to resume work if the care receiver requires care for extended periods.¹¹

Kratz and colleagues showed that caregivers of individuals with moderate-to-severe TBI: (1) felt overburdened with responsibilities; (2) lacked personal time and time for self-care; (3) felt their lives were interrupted or lost; (4) grieved the loss of the person with TBI; and (5) endorsed anger, guilt, anxiety, and sadness.¹²

Perceptions differed between caregiver parents and caregiver partners. Parents expressed feelings of grief and sadness related to the “loss of the person before the TBI.” Parents also reported a sense of guilt and responsibility for their child’s TBI and feelings of being tied down to the individual with TBI. Parents experienced a greater level of stress if the son or daughter with TBI still lived at home. Partners expressed frustration and despair related to their role as sole decision maker and care provider. Partners’ distress also related to the partner relationship and the relationship between children and the individual with TBI.

Verhasghe and colleagues found that partners experience a greater degree of stress than do parents.¹³ Young families with minimal social support for coping with financial, psychiatric, and medical problems were the most vulnerable to stress. A systematic review by Ennis and colleagues evaluated depression and anxiety in caregiver parents vs spouses.¹⁴ Although methods and quality differed in the studies, findings indicated high levels of distress regardless of the type of caregiver.

Anderson and colleagues used the Ways of Coping Questionnaire to evaluate the association between coping and psychological adjustment in caregivers of TBI individuals.¹⁰ The use of emotion-focused coping and problem solving was possibly associated with psychological adjustment in caregivers. Verhasghe and colleagues indicated that the nature of the injuries more than the severity of TBI determined the level of stress up to 15 years after the TBI.¹³ Gender and social and professional support also influenced coping. The review identified the need to develop models of long-term support and care.

An Australian cohort of 79 family caregivers participated in a study by Perlesz and colleagues.¹⁵ Participants’ caregiving responsibilities averaged 19.3 months posttrauma. The Family Satisfaction Scale, Beck Depression Inventory, State Anxiety Inventory, and Profile of Mood States were used in this analysis. Male caregivers reported distress in terms of anger and fatigue; female caregivers were at greatest risk of poor psychosocial outcomes. Although findings from primary caregivers indicated that 35% to 49% displayed enough distress to warrant clinical intervention, between 51% and 80% were not psychologically distressed and were satisfied with their families. Data supported previous reports suggesting caregivers are “not universally distressed.”¹⁵

Manskow and colleagues followed patients with severe TBI and assessed caregiver burden 1 year later. Using the Caregiver Burden Scale, caregivers reported the highest scores (N = 92) on the General Strain Index followed by the Disappointment Index.¹⁶ Bayen and colleagues also studied caregivers of severe TBI patients.¹⁷ Objective and subjective caregiver burden data 4 years later indicated 44% of caregivers (N = 98) reported multidimensional burden. Greater burden was associated in caring for individuals who had poorer Glasgow Outcome Scale Extended scores and more severe cognitive disorders.

Military and Veteran Literature

Griffin and colleagues conducted the Family and Caregiver Experience Study (FACES) with caregivers (N = 564) of service members who incurred a TBI.³ According to the caregivers, two-thirds of the patients lost consciousness for more than 30 minutes, which was followed by inpatient rehabilitation care at a VA polytrauma center between 2001 and 2009. The majority of caregivers of TBI patients were female (79%) and aged < 60 years (84%). Parents comprised 62% and spouses 32% of the cohort. Caregivers tended to have some level of education beyond high school (73%), were married (77%), either worked or were enrolled in school (55%), and earned less than $40,000 a year (70%). Common characteristics of the care receivers were male gender (95%), average age 30, high school educated (52%), married (almost 50%), and employed (50%). Forty-five percent of the care receivers were injured 4 to 6 years prior, and 12% were injured 7 or more years prior. The study determined the caregivers’ perception of intensity of care needed and indicated that families as well as clinicians need to plan for some level of long-term support and services.

In addition to the TBI-related caregiving needs, Griffin and colleagues found in a military population that other medical conditions impacted the level of caregiving and strained a marriage.¹⁸ Their study found that in a military population between 30% and 50% of marriages of patients with TBI dissolved within the first 10 years after injury. Caregivers may need to learn nursing activities, such as tube feedings, tracheostomy and stoma care, catheter care, wound care, and medication administration. Family stress with caregiving may interfere with the ability to understand information related to the care receivers’ medical care and may require multiple formats to explain care needs. Sander and colleagues associated better emotional functioning in caregivers with greater social integration and occupation outcomes in patients at the postacute rehabilitation program phase (within 6 months of injury).¹⁹ However, these outcomes did not continue more than 6 months postinjury.

Intervention and Research Studies

Powell and colleagues used a telephone-based, individualized TBI education intervention along with problem-solving mentoring (10 phone calls at 2-week intervals following patient discharge for moderate-to-severe TBI from a level 1 trauma center) to determine which programs, activities, and coping strategies could decrease caregiver challenges.²⁰ The telephone interventions resulted in better caregiver outcomes than usual care as measured by composite scores on the Bakas Caregiving Outcomes Scale (BCOS) and the Brief Symptom Inventory (BSI-18) at 6 months post-TBI survivor discharge. Dyer and colleagues explored Internet approaches and mobile applications to provide support for caregivers. ¹⁸ In a small sample of 10 caregivers, Damianakis and colleagues conducted a 10-session pilot videoconferencing support-group intervention program led by a clinician. Results indicated that the intervention enhanced caregiver coping and problem-solving skills.⁷

Petranovich and colleagues examined the efficacy of counselor-assisted problem-solving interventions in improving long-term caregiver psychological functioning following TBI in adolescents.²¹ Their findings support the utility of online interventions in improving long-term caregiver psychological distress, particularly for lower income families. Although this study focused on adolescents, research may indicate merit in an adult population. In relatives of patients with severe TBI, Norup and colleagues associated improvements in health-related quality of life (HRQOL) with improvements in symptoms of anxiety and depression without specific intervention.²²

Moriarty and colleagues conducted a randomized controlled trial for veterans who received care at a VA polytrauma center and their family members who participated in a veteran’s in-home program (VIP) intervention.⁹ The study aimed to evaluate how VIP affected family members’ caregiver burden, depressive symptoms, satisfaction with caregiving, and the program’s acceptability. Eighty-one veterans with a key family member were randomized. Of those, 63 veterans completed a follow-up interview. The intervention consisted of 6 home visits of 1 to 2 hours each and 2 telephone calls from an occupational therapist over 3 to 4 months. Family members were invited to participate during the home visits. The control group received usual clinic care with 2 telephone calls during the study period. All participants received the follow-up interview 3 to 4 months after baseline interviews. The severity of TBI was determined by a review of the electronic medical record using the VA/DoD Clinical Practice Guidelines. Findings of this study indicated that family members in the intervention group showed significantly lower depressive symptom scores and caregiver burden scores.⁹ Additionally, the veterans in the intervention group exhibited higher community integration and ability to manage their targeted outcomes. Further research may indicate that VIP could assist patients with TBI and caregivers in an active-duty population.

The DVBIC is the executive agent for a congressionally mandated 15-year longitudinal study on TBI incurred by members of the armed services in OEF and OIF. The John Warner National Defense Authorization Act for Fiscal Year 2007 outlined the study. An initial finding identified the need for an HRQOL outcomes assessment specific to TBI caregivers.²³ Having these data will allow investigators to fully determine the comprehensive impact of caring for a person who sustained a mild, moderate, severe, or penetrating TBI and to evaluate the effectiveness of interventions designed to address caregivers’ needs. To date, the study has identified the following HRQOL themes generated among caregivers: social health, emotional health, physical/medical health, cognitive functioning, and feelings of loss (related to changing social roles). Carlozzi and colleagues noted that the study also aimed to identify a sensitive outcome measure to evaluate quality of life in the caregivers over time.⁷

Knowledge Gaps

Ongoing studies focus on caregiving for individuals with various illnesses and needs. Some of the information in each study may be beneficial to TBI caregivers who are not fully aware of resources and interventions. For example, Fortune and colleagues, Hirano and colleagues, and Grover and colleagues are studying caregiver activities involving other diseases to determine, more generally, which programs, activities, and coping strategies can decrease caregiver challenges.^24-26 Further, understanding and addressing the needs of these families over many years will provide data that could inform policy, benefits, resources, and needed services (such as the Caregivers and Veterans Omnibus Health Services Act of 2010) and assist with family resilience efforts, including understanding and enhancing family protective and recovery factors.

As studies have indicated, some families do not report family distress when providing care to an individual with TBI. Understanding the factors that influence positive family adjustment is important to capture and perhaps replicate in future studies so that they can lead to effective treatment interventions. Although this review does not discuss caregiver needs for patients with TBI with disorders of consciousness that require more care than most caregivers can provide in the home setting, caregiving for this population deserves attention in future studies. Furthermore, an area that has not received much attention is the impact on children in the household. Children aged < 18 years can assist not only in the care of a disabled adult, but also of younger siblings; also they can help with household activities from housekeeping to meal preparation. Children also may provide physical and emotional support.

The impact of aging caregivers and subsequent needs for their own care as well as the person(s) they are providing care for has not been fully addressed. Areas requiring more research include both the aging caregiver taking care of an aging spouse or relative and the aging parent taking care of a young adult or child. Along with aging, the issue of long-term caregiving needs further development. For example, how do the differences between access to services between caregivers of adults with TBI in the military and those in the civilian sector impact the family/caregiver? Further research may answer questions such as:

• Which tools are most useful in evaluating and determining caregiver stress and burden?
• Are the needs of military and veteran caregivers unique?
• Do polytrauma patients with comorbid diagnoses have unique caregiver needs and trajectories?
• Do TBI caregiver stressors differ from stressors related to other medical conditions or chronic diseases?
• Is there a need for military and veteran TBI-specific caregiver programs?
• Which interventions best help caregivers and for how long?
• Should the approach to intervention depend on variables such as age and gender of the caregivers or relationship to the patient with a TBI (eg, spouse vs parent)?

Methods or processes to inform and update caregivers about available resources also are critically needed. Also, Sabab and colleagues noted the importance of research on the effects of denial as it relates to cognitive, emotional, social impact.²⁷ Denial may impact delays in treatments.

Resource

Many national, state, local, and grassroots organizations provide information and support for persons with illness and/or disabilities. Most clinicians of neurologic, mental health, and cancer have developed various forms of support interventions for those with the disease and their caregivers (Table 2). Highlighted in this section are a few organizations that specifically provide resources for caregivers caring for active-duty service members or veterans with a TBI.

Although a caregiver generally does not receive money from an outside source for services, the DoD may consider the caregiver as a nonmedical attendant for an active-duty service member and provide a temporary stipend. The VA provides several support and service options for caregivers under the Caregiver Support Program, through which more than 300 VA health care professionals provide support to caregivers. The Caregivers and Veterans Omnibus Health Services Act of 2010 authorizes the VA to provide additional VA services for seriously injured post-9/11 veterans and their family caregivers through the Program of Comprehensive Assistance for Family Caregivers (VA Caregiver Support Program). After meeting eligibility criteria, primary caregivers of post-9/11 veterans may receive a monthly stipend (based on the level of care needed) as well as comprehensive caregiver training, referral services, access to health care insurance, mental health services, counseling, and respite care. The Caregiver Support Program offers a toll-free support line and a 24-hour crisis hot line.

In 2014, the Government Accountability Office (GAO) outlined the VA health care improvements needed to manage the demand for the Caregiver Support Program, which are established at VA medical centers.²⁸ The GAO reported that the “VA significantly underestimated caregivers’ demand for services… larger than expected workloads and …delays in approval determinations” with about 500 approved caregivers who are added to the program each month. Original estimates indicated that about 4,000 caregivers would be approved by September 2014; however, by May 2014 about 15,600 caregivers were approved.

In addition to the VA Caregiver Support Program, a variety of state, local, and nonprofit organizations offer support for caregivers. Established in 2012, the Elizabeth Dole Foundation’s program Caring for Military Families “assists caregivers by raising awareness of the caregiver role, leveraging resources and partnerships to provide support, and identifying best practices and solutions to address the challenges caregivers face.” The foundation commissioned the RAND Corporation to “describe the magnitude of military caregiving in the United States, and to identify gaps in programs, policies, and services.” The 2014 RAND report estimated that among the 5.5 million military caregivers in the U.S., 1 million (19.6%) cared for post-9/11 veterans.²⁹ The military caregivers consistently experienced poorer health outcomes, greater strains on family relationships, and more workplace problems than noncaregivers; post-9/11 military caregivers fared worse in those areas.

The Elizabeth Dole Foundation, Hidden Heroes Impact Council Forum advocates for caregiver empowerment, cultural competency awareness, and better policies, programs, and services. The council focuses its efforts on key impact: community support at home, education and training, employment and workplace support, financial and legal issues, interfaith action and ministry council, mental and physical health, and respite care. It aims to raise the money to build awareness and support for military and veterans’ caregivers. The Military and Veteran Caregiver Network is another Elizabeth Dole Foundation initiative. It is an online forum community, peer support group, and peer mentor program structure. A resource library for referrals to local services also is available.

A variety of other organizations, such as United Service Organizations; Easter Seals; Team Red, White and Blue; Operation Homefront; Blue Star Families; state Brain Injury Associations; and support groups for TBI at local hospitals and community centers provide resources to both patients and caregivers. Organizations for caregivers not exclusive to TBI patients include the Caregiver Action Network (formerly National Family Caregiver Association) and the Family Caregiver Alliance. The National Family Caregivers Support Program provides grants to states and territories to develop and provide supportive services to caregivers. Some training for caregivers could include long-term financial planning, legal issues, residential and educational planning, caregiver stress management, the benefits of utilizing support resources, and actions and behaviors that enhance coping strategies. In 2007, DVBIC developed The Traumatic Brain Injury Guide for Caregivers of Service Members and Veterans, which is intended for family caregivers assisting a service member or veteran who sustained a moderate or severe TBI.⁶ A recent assessment determined the need to update the guide. The Center of Excellence for Medical Multimedia is another source of information for caregivers.

Conclusion

The recent combat conflicts of OEF and OIF have resulted in a dramatic increase in the occurrence of TBI injuries in active-duty service members both in theater and stateside and have highlighted the need for some service members and veterans with a TBI to require ongoing assistance from a caregiver. The levels of assistance and length of time vary greatly, impacted by the severity of the TBI and psychosocial situations.

In response to elevated awareness, several programs and resources have been developed or enhanced to address the specific needs of caregivers. Certain programs and resources are specific for caregivers of military service members and veterans, whereas others benefit caregivers in general. Likewise, some programs are not specific to individuals with TBI.

Caregivers assume many roles in their efforts to support the person with a TBI. They may need to dramatically adjust their lives to serve as a caregiver. Providing adequate resources for the caregivers impacts their ability to continue providing care. Thus, awareness of and access to resources play a critical role in helping to reduce stress, distress, burden (eg, physical, emotional, and financial), and caregiver burnout. Programs and resources often change, making it difficult for health care practitioners to know which programs offer what or even whether they still exist. Therefore, the authors synthesized the current medical literature of the topic of TBI and their caregiver needs as well as current resources for additional information and support.

Ongoing research studies, such as the congressionally mandated 15-year longitudinal study, are examining the impact of caregiving in the military and veteran communities. Future research could identify specific needs of military caregivers, identify gaps in services or programs, and identify interventions that promote resilience. Moreover, research directed at military and veteran caregivers can promote change that will benefit the general population of caregivers. It will be important for health care practitioners to keep abreast of new findings and information to incorporate into care plans for their patients who have had a TBI and their families.

Combat veterans who have served in Iraq and Afghanistan in the post-9/11 era face unique reintegration challenges, one being the transition from driving in combat zones to driving at home.¹ Relative to previous conflicts, post-9/11 combat involves increased participation in road patrols and convoys along with more prevalent threats of improvised explosive devices (IEDs).^1,2 Roadside ambushes designed to destroy or stop vehicles became a common warfare strategy, meaning that driving became an inherently dangerous combat maneuver.³

The modern combat driving framework includes cognitive tools (eg, targeted aggression and tactical awareness) combined with specific behaviors (eg, driving unpredictably fast, using rapid lane changes, and keeping other vehicles at a distance to avoid IEDs).⁴ This framework is adaptive and lifesaving in combat zones, but it can be maladaptive and dangerous in civilian environments. Service members face difficulty in updating this cognitive framework after leaving combat zones and may continue to experience specific cognitions (eg, “the world is dangerous”; “that car holds an IED”) while driving on civilian roads.^3,5-8

The high prevalence of posttraumatic stress disorder (PTSD) and traumatic brain injury (TBI) in post-9/11 veterans may complicate reintegration. Both PTSD and TBI are considered signature wounds of these conflicts.^8-11 Traumatic brain injury may be sustained as a result of blast injury or other mechanism, including a closed head injury or penetrating brain injury.¹⁰ Previous literature indicated that both PTSD and TBI across all severities are related to deficits in executive functioning, attention, and memory.^12-16

In addition to cognitive deficits, veterans with PTSD also may experience cognitive misappraisal, in which they are more likely to perceive ambiguous stimuli as threatening because of an inability to suppress trauma-related schema and associations.^5,17,18 Examples of roadside-specific trauma triggers include busy highways, traffic, loud or distracting noises, and vehicles of similar make and model as those commonly rigged with IEDs in Iraq or Afghanistan.^2,7

Blast injury, often from IEDs, is the most common cause of TBI reported in U.S. service members, so veterans that have experienced such an injury may become hyperaware of vehicles that may appear to hide IEDs.^7,19 Cognitive dysfunction and misappraisal of neutral stimuli may have an additive effect on behaviors and experiences behind the wheel.^7,15,20 As a result, veterans with comorbid PTSD and TBI may drive unsafely, self-restrict driving time, or avoid driving completely.^5,8,18

Prior research suggests that veterans with PTSD and/or TBI experience significantly higher levels of anxiety in response to common roadside stimuli (ie, an overpass or stop sign) while driving than do veterans without either PTSD or TBI.³ Cognitive behavioral therapy (CBT) interventions have been developed and systematically evaluated for treating anxiety.²¹ The goal of CBT is to identify and change dysfunctional cognitions that result in biased information processing. Cognitive restructuring, the process by which problematic cognitions (negative automatic thoughts) are identified and examined for distortions, is one method of accomplishing this goal. Distortions then are disputed and rebutted with assistance from the clinician.²² A strategy for restructuring negative automatic thoughts is coping self-instruction, which centers on identifying when negative automatic thoughts are focused on others’ behavior, accepting that their behavior cannot be changed, and using positive coping behaviors to minimize negative automatic thoughts.²³

The link between history of comorbid PTSD and TBI and combat driving, current driving anxiety, and coping strategies has not yet been extensively studied in veterans. Thus, the aim of the current study is to determine whether veterans with comorbid PTSD and TBI utilize coping self-instruction behind the wheel. Driving-specific coping self-instruction involves generating thoughts that are adaptive and accepting of others’ driving behaviors (eg, “Just turn up the radio and tune them out”). It was hypothesized that veterans with comorbid PTSD and TBI would endorse fewer coping self-instruction thoughts than would veterans without either PTSD or TBI.

Methods

The current project is part of a larger study that examines driving behaviors of post-9/11 combat veterans at the Michael J. Crescenz Veterans Affairs Medical Center in Philadelphia, Pennsylvania. Thirty-two male veterans aged between 22 and 48 years (M = 31.6, SD = 6.9) were included in the sample. Twenty-three were diagnosed with comorbid PTSD and TBI and 9 veterans with no major psychiatric or physical

Assessment

All participants completed a battery of questionnaires, including the Driver’s Angry Thoughts Questionnaire (DATQ).²³ The DATQ was used to investigate the specific thoughts that veterans experienced while driving.²³ Participants indicated on a Likert scale from 1 (not at all) to 5 (all the time) how often they experienced any of 65 thoughts while driving. Each item was categorized into 1 of 5 distinct subscales (Table 2). A frequency score was generated for each of the 5 subscales. Each subscale had good internal consistency and convergent, divergent, and predictive validity. The Coping Self-Instruction subscale, which is defined as engaging in relaxing thoughts to accept others’ driving behaviors, was of primary interest. It is a 9-item scale (frequency score can range from 9 to 45) with good reliability (α = .83).²³

Given the small and unequal sample sizes, nonparametric independent samples Mann-Whitney U-tests were selected to compare frequency of driving-related thoughts across veterans with comorbid PTSD and TBI and those of veterans without either PTSD or TBI.

Results

Descriptive statistics and results for each DATQ subscale are reported in Table 3. Group comparisons revealed that veterans with comorbid PTSD and TBI endorsed statistically significantly fewer coping self-instruction thoughts while driving (M = 11.5, SD = 7.2) than did combat veterans without either PTSD or TBI (M = 18.1, SD = 6.9; U = 56.0, P = .05). Conversely, frequency of angry thoughts were statistically significant in their difference as a function of PTSD or TBI diagnostic status.

Discussion

While driving, veterans with PTSD or TBI endorsed statistically significantly fewer coping self-instruction thoughts than did veterans without either PTSD or TBI. Prior research suggests that veterans with PTSD or TBI experience greater anxiety than do veterans without either condition while driving.^2,3 Taken together, this suggests that veterans with PTSD or TBI may lack efficient cognitive coping strategies related to the anxiety they experience while driving. Furthermore, the groups did not significantly differ in frequency of angry thoughts behind the wheel. This result was expected based on prior analyses that suggested that veterans with and without PTSD or TBI endorsed feelings of aggression, impatience, and frustration while driving at similar frequencies.³

Because all veterans in the current sample were exposed to combat, these results help to parse out the unique contribution of PTSD and TBI diagnoses on driving in civilian environments. Exposure to combat plus diagnoses of PTSD or TBI may be related to veterans’ ability to cope with typical driving situations at home. In the context of prior literature, results suggest that veterans with PTSD or TBI automatically may perceive neutral roadside stimuli as threatening, feel anxious in response to this perceived threat, and be ill-equipped to cope with this anxiety.^3,5,17,18 According to CBT models, negative automatic thoughts play a critical role in maintaining anxiety.²⁴ Particular cognitive distortions associated with PTSD symptomatology and combat driving experiences, such as misperceiving ambiguous stimuli as threatening because of an inability to suppress trauma-related schema and associations, may therefore maintain driving anxiety following military separation.

Research on CBT interventions suggests that cognitive restructuring, including coping self-instruction, are effective treatments to reduce anxiety.^22,24 The current findings suggest that combat veterans with PTSD and TBI who experience driving anxiety endorse significantly fewer coping self-instruction thoughts than do controls in response to anxiety-provoking driving situations. In fact, prior research suggests that a majority of veterans experiencing driving-related anxiety do not seek help for their symptoms, and many of those who do prefer to reach out to friends rather than mental health professionals.² However, due to their high levels of anxiety, these veterans likely would benefit from CBT interventions specifically targeted to coping strategies for civilian driving. These coping strategies should focus on recognizing that common roadside stimuli are not necessarily threatening in civilian environments. This type of cognitive restructuring may help veterans better manage anxiety while driving.

Limitations

The current study is limited by its small and unequal sample sizes and lack of a noncombat exposure comparison group. Additionally, while this study highlights a potential relationship between reduced cognitive coping strategies and behind-the-wheel anxiety in veterans with PTSD or TBI, causal inferences cannot be made. It is possible that individuals without coping strategies who are deployed to combat are more likely to develop PTSD or TBI. Being equipped with few coping strategies may then lead these veterans to experience greater anxiety while driving. Conversely, PTSD and TBI symptoms may prevent veterans from developing coping strategies over time.

Furthermore, the comorbid PTSD and TBI group was separated from the military for significantly longer than was the control group. Future studies using a longitudinal design could better examine the potential causal relationship between comorbid PTSD and TBI and coping and determine whether endorsement of coping self-instruction changes as a function of time since military separation.

Veterans in the current study report a variety of deployment experiences and locations. Methods of combat, type of vehicle, driving terrain, and prevalence of IEDs changed over the multiple post-9/11 military campaigns. Veterans who were deployed to Iraq in the mid-2000s were instructed to drive quickly and erratically to avoid IEDs and mortars, whereas veterans deployed in later years were taught to drive slowly and carefully to hunt for IEDs in heavily armored vehicles.³ Seventy-five percent of the veterans with PTSD or TBI in the current sample were deployed to Iraq in the early to mid-2000s, compared with 33% of the veterans without PTSD or TBI. Thus, the 2 groups in the current sample may have experienced different combat environments, which could impact how they perceived roadside stimuli. Future studies should recruit a larger and more balanced sample to better determine whether specific combat experiences impact coping strategies while driving.

Conclusion

To the best of the authors’ knowledge, the current study is the first to examine specific types of thoughts that veterans with and without PTSD or TBI experience while driving on civilian roads. Veterans with PTSD or TBI are not engaging in as many coping self-instruction thoughts behind the wheel, despite experiencing greater anxiety than that of veterans without either PTSD or TBI. Cognitive behavioral therapy interventions for anxiety include engaging in coping self-instruction during anxiety-provoking situations.²² Therefore, veterans with PTSD or TBI may benefit from learning targeted coping self-instruction thoughts that they can utilize when anxiety-provoking situations arise behind the wheel. Results suggest that clinicians should work with veterans with comorbid PTSD and TBI to develop specific coping self-instruction statements that they can utilize internally when faced with anxiety-provoking driving situations.

Acknowledgments
This study is the result of work supported by the Council on Brain Injury (grant #260472). The authors thank Dr. Rosette Biester for her guidance.

Combat veterans who have served in Iraq and Afghanistan in the post-9/11 era face unique reintegration challenges, one being the transition from driving in combat zones to driving at home.¹ Relative to previous conflicts, post-9/11 combat involves increased participation in road patrols and convoys along with more prevalent threats of improvised explosive devices (IEDs).^1,2 Roadside ambushes designed to destroy or stop vehicles became a common warfare strategy, meaning that driving became an inherently dangerous combat maneuver.³

The modern combat driving framework includes cognitive tools (eg, targeted aggression and tactical awareness) combined with specific behaviors (eg, driving unpredictably fast, using rapid lane changes, and keeping other vehicles at a distance to avoid IEDs).⁴ This framework is adaptive and lifesaving in combat zones, but it can be maladaptive and dangerous in civilian environments. Service members face difficulty in updating this cognitive framework after leaving combat zones and may continue to experience specific cognitions (eg, “the world is dangerous”; “that car holds an IED”) while driving on civilian roads.^3,5-8

The high prevalence of posttraumatic stress disorder (PTSD) and traumatic brain injury (TBI) in post-9/11 veterans may complicate reintegration. Both PTSD and TBI are considered signature wounds of these conflicts.^8-11 Traumatic brain injury may be sustained as a result of blast injury or other mechanism, including a closed head injury or penetrating brain injury.¹⁰ Previous literature indicated that both PTSD and TBI across all severities are related to deficits in executive functioning, attention, and memory.^12-16

In addition to cognitive deficits, veterans with PTSD also may experience cognitive misappraisal, in which they are more likely to perceive ambiguous stimuli as threatening because of an inability to suppress trauma-related schema and associations.^5,17,18 Examples of roadside-specific trauma triggers include busy highways, traffic, loud or distracting noises, and vehicles of similar make and model as those commonly rigged with IEDs in Iraq or Afghanistan.^2,7

Blast injury, often from IEDs, is the most common cause of TBI reported in U.S. service members, so veterans that have experienced such an injury may become hyperaware of vehicles that may appear to hide IEDs.^7,19 Cognitive dysfunction and misappraisal of neutral stimuli may have an additive effect on behaviors and experiences behind the wheel.^7,15,20 As a result, veterans with comorbid PTSD and TBI may drive unsafely, self-restrict driving time, or avoid driving completely.^5,8,18

Prior research suggests that veterans with PTSD and/or TBI experience significantly higher levels of anxiety in response to common roadside stimuli (ie, an overpass or stop sign) while driving than do veterans without either PTSD or TBI.³ Cognitive behavioral therapy (CBT) interventions have been developed and systematically evaluated for treating anxiety.²¹ The goal of CBT is to identify and change dysfunctional cognitions that result in biased information processing. Cognitive restructuring, the process by which problematic cognitions (negative automatic thoughts) are identified and examined for distortions, is one method of accomplishing this goal. Distortions then are disputed and rebutted with assistance from the clinician.²² A strategy for restructuring negative automatic thoughts is coping self-instruction, which centers on identifying when negative automatic thoughts are focused on others’ behavior, accepting that their behavior cannot be changed, and using positive coping behaviors to minimize negative automatic thoughts.²³

The link between history of comorbid PTSD and TBI and combat driving, current driving anxiety, and coping strategies has not yet been extensively studied in veterans. Thus, the aim of the current study is to determine whether veterans with comorbid PTSD and TBI utilize coping self-instruction behind the wheel. Driving-specific coping self-instruction involves generating thoughts that are adaptive and accepting of others’ driving behaviors (eg, “Just turn up the radio and tune them out”). It was hypothesized that veterans with comorbid PTSD and TBI would endorse fewer coping self-instruction thoughts than would veterans without either PTSD or TBI.

Methods

The current project is part of a larger study that examines driving behaviors of post-9/11 combat veterans at the Michael J. Crescenz Veterans Affairs Medical Center in Philadelphia, Pennsylvania. Thirty-two male veterans aged between 22 and 48 years (M = 31.6, SD = 6.9) were included in the sample. Twenty-three were diagnosed with comorbid PTSD and TBI and 9 veterans with no major psychiatric or physical

Assessment

All participants completed a battery of questionnaires, including the Driver’s Angry Thoughts Questionnaire (DATQ).²³ The DATQ was used to investigate the specific thoughts that veterans experienced while driving.²³ Participants indicated on a Likert scale from 1 (not at all) to 5 (all the time) how often they experienced any of 65 thoughts while driving. Each item was categorized into 1 of 5 distinct subscales (Table 2). A frequency score was generated for each of the 5 subscales. Each subscale had good internal consistency and convergent, divergent, and predictive validity. The Coping Self-Instruction subscale, which is defined as engaging in relaxing thoughts to accept others’ driving behaviors, was of primary interest. It is a 9-item scale (frequency score can range from 9 to 45) with good reliability (α = .83).²³

Given the small and unequal sample sizes, nonparametric independent samples Mann-Whitney U-tests were selected to compare frequency of driving-related thoughts across veterans with comorbid PTSD and TBI and those of veterans without either PTSD or TBI.

Results

Descriptive statistics and results for each DATQ subscale are reported in Table 3. Group comparisons revealed that veterans with comorbid PTSD and TBI endorsed statistically significantly fewer coping self-instruction thoughts while driving (M = 11.5, SD = 7.2) than did combat veterans without either PTSD or TBI (M = 18.1, SD = 6.9; U = 56.0, P = .05). Conversely, frequency of angry thoughts were statistically significant in their difference as a function of PTSD or TBI diagnostic status.

Discussion

While driving, veterans with PTSD or TBI endorsed statistically significantly fewer coping self-instruction thoughts than did veterans without either PTSD or TBI. Prior research suggests that veterans with PTSD or TBI experience greater anxiety than do veterans without either condition while driving.^2,3 Taken together, this suggests that veterans with PTSD or TBI may lack efficient cognitive coping strategies related to the anxiety they experience while driving. Furthermore, the groups did not significantly differ in frequency of angry thoughts behind the wheel. This result was expected based on prior analyses that suggested that veterans with and without PTSD or TBI endorsed feelings of aggression, impatience, and frustration while driving at similar frequencies.³

Because all veterans in the current sample were exposed to combat, these results help to parse out the unique contribution of PTSD and TBI diagnoses on driving in civilian environments. Exposure to combat plus diagnoses of PTSD or TBI may be related to veterans’ ability to cope with typical driving situations at home. In the context of prior literature, results suggest that veterans with PTSD or TBI automatically may perceive neutral roadside stimuli as threatening, feel anxious in response to this perceived threat, and be ill-equipped to cope with this anxiety.^3,5,17,18 According to CBT models, negative automatic thoughts play a critical role in maintaining anxiety.²⁴ Particular cognitive distortions associated with PTSD symptomatology and combat driving experiences, such as misperceiving ambiguous stimuli as threatening because of an inability to suppress trauma-related schema and associations, may therefore maintain driving anxiety following military separation.

Research on CBT interventions suggests that cognitive restructuring, including coping self-instruction, are effective treatments to reduce anxiety.^22,24 The current findings suggest that combat veterans with PTSD and TBI who experience driving anxiety endorse significantly fewer coping self-instruction thoughts than do controls in response to anxiety-provoking driving situations. In fact, prior research suggests that a majority of veterans experiencing driving-related anxiety do not seek help for their symptoms, and many of those who do prefer to reach out to friends rather than mental health professionals.² However, due to their high levels of anxiety, these veterans likely would benefit from CBT interventions specifically targeted to coping strategies for civilian driving. These coping strategies should focus on recognizing that common roadside stimuli are not necessarily threatening in civilian environments. This type of cognitive restructuring may help veterans better manage anxiety while driving.

Limitations

The current study is limited by its small and unequal sample sizes and lack of a noncombat exposure comparison group. Additionally, while this study highlights a potential relationship between reduced cognitive coping strategies and behind-the-wheel anxiety in veterans with PTSD or TBI, causal inferences cannot be made. It is possible that individuals without coping strategies who are deployed to combat are more likely to develop PTSD or TBI. Being equipped with few coping strategies may then lead these veterans to experience greater anxiety while driving. Conversely, PTSD and TBI symptoms may prevent veterans from developing coping strategies over time.

Furthermore, the comorbid PTSD and TBI group was separated from the military for significantly longer than was the control group. Future studies using a longitudinal design could better examine the potential causal relationship between comorbid PTSD and TBI and coping and determine whether endorsement of coping self-instruction changes as a function of time since military separation.

Veterans in the current study report a variety of deployment experiences and locations. Methods of combat, type of vehicle, driving terrain, and prevalence of IEDs changed over the multiple post-9/11 military campaigns. Veterans who were deployed to Iraq in the mid-2000s were instructed to drive quickly and erratically to avoid IEDs and mortars, whereas veterans deployed in later years were taught to drive slowly and carefully to hunt for IEDs in heavily armored vehicles.³ Seventy-five percent of the veterans with PTSD or TBI in the current sample were deployed to Iraq in the early to mid-2000s, compared with 33% of the veterans without PTSD or TBI. Thus, the 2 groups in the current sample may have experienced different combat environments, which could impact how they perceived roadside stimuli. Future studies should recruit a larger and more balanced sample to better determine whether specific combat experiences impact coping strategies while driving.

Conclusion

To the best of the authors’ knowledge, the current study is the first to examine specific types of thoughts that veterans with and without PTSD or TBI experience while driving on civilian roads. Veterans with PTSD or TBI are not engaging in as many coping self-instruction thoughts behind the wheel, despite experiencing greater anxiety than that of veterans without either PTSD or TBI. Cognitive behavioral therapy interventions for anxiety include engaging in coping self-instruction during anxiety-provoking situations.²² Therefore, veterans with PTSD or TBI may benefit from learning targeted coping self-instruction thoughts that they can utilize when anxiety-provoking situations arise behind the wheel. Results suggest that clinicians should work with veterans with comorbid PTSD and TBI to develop specific coping self-instruction statements that they can utilize internally when faced with anxiety-provoking driving situations.

Acknowledgments
This study is the result of work supported by the Council on Brain Injury (grant #260472). The authors thank Dr. Rosette Biester for her guidance.

Combat veterans who have served in Iraq and Afghanistan in the post-9/11 era face unique reintegration challenges, one being the transition from driving in combat zones to driving at home.¹ Relative to previous conflicts, post-9/11 combat involves increased participation in road patrols and convoys along with more prevalent threats of improvised explosive devices (IEDs).^1,2 Roadside ambushes designed to destroy or stop vehicles became a common warfare strategy, meaning that driving became an inherently dangerous combat maneuver.³

The modern combat driving framework includes cognitive tools (eg, targeted aggression and tactical awareness) combined with specific behaviors (eg, driving unpredictably fast, using rapid lane changes, and keeping other vehicles at a distance to avoid IEDs).⁴ This framework is adaptive and lifesaving in combat zones, but it can be maladaptive and dangerous in civilian environments. Service members face difficulty in updating this cognitive framework after leaving combat zones and may continue to experience specific cognitions (eg, “the world is dangerous”; “that car holds an IED”) while driving on civilian roads.^3,5-8

The high prevalence of posttraumatic stress disorder (PTSD) and traumatic brain injury (TBI) in post-9/11 veterans may complicate reintegration. Both PTSD and TBI are considered signature wounds of these conflicts.^8-11 Traumatic brain injury may be sustained as a result of blast injury or other mechanism, including a closed head injury or penetrating brain injury.¹⁰ Previous literature indicated that both PTSD and TBI across all severities are related to deficits in executive functioning, attention, and memory.^12-16

In addition to cognitive deficits, veterans with PTSD also may experience cognitive misappraisal, in which they are more likely to perceive ambiguous stimuli as threatening because of an inability to suppress trauma-related schema and associations.^5,17,18 Examples of roadside-specific trauma triggers include busy highways, traffic, loud or distracting noises, and vehicles of similar make and model as those commonly rigged with IEDs in Iraq or Afghanistan.^2,7

Blast injury, often from IEDs, is the most common cause of TBI reported in U.S. service members, so veterans that have experienced such an injury may become hyperaware of vehicles that may appear to hide IEDs.^7,19 Cognitive dysfunction and misappraisal of neutral stimuli may have an additive effect on behaviors and experiences behind the wheel.^7,15,20 As a result, veterans with comorbid PTSD and TBI may drive unsafely, self-restrict driving time, or avoid driving completely.^5,8,18

Prior research suggests that veterans with PTSD and/or TBI experience significantly higher levels of anxiety in response to common roadside stimuli (ie, an overpass or stop sign) while driving than do veterans without either PTSD or TBI.³ Cognitive behavioral therapy (CBT) interventions have been developed and systematically evaluated for treating anxiety.²¹ The goal of CBT is to identify and change dysfunctional cognitions that result in biased information processing. Cognitive restructuring, the process by which problematic cognitions (negative automatic thoughts) are identified and examined for distortions, is one method of accomplishing this goal. Distortions then are disputed and rebutted with assistance from the clinician.²² A strategy for restructuring negative automatic thoughts is coping self-instruction, which centers on identifying when negative automatic thoughts are focused on others’ behavior, accepting that their behavior cannot be changed, and using positive coping behaviors to minimize negative automatic thoughts.²³

The link between history of comorbid PTSD and TBI and combat driving, current driving anxiety, and coping strategies has not yet been extensively studied in veterans. Thus, the aim of the current study is to determine whether veterans with comorbid PTSD and TBI utilize coping self-instruction behind the wheel. Driving-specific coping self-instruction involves generating thoughts that are adaptive and accepting of others’ driving behaviors (eg, “Just turn up the radio and tune them out”). It was hypothesized that veterans with comorbid PTSD and TBI would endorse fewer coping self-instruction thoughts than would veterans without either PTSD or TBI.

Methods

The current project is part of a larger study that examines driving behaviors of post-9/11 combat veterans at the Michael J. Crescenz Veterans Affairs Medical Center in Philadelphia, Pennsylvania. Thirty-two male veterans aged between 22 and 48 years (M = 31.6, SD = 6.9) were included in the sample. Twenty-three were diagnosed with comorbid PTSD and TBI and 9 veterans with no major psychiatric or physical

Assessment

All participants completed a battery of questionnaires, including the Driver’s Angry Thoughts Questionnaire (DATQ).²³ The DATQ was used to investigate the specific thoughts that veterans experienced while driving.²³ Participants indicated on a Likert scale from 1 (not at all) to 5 (all the time) how often they experienced any of 65 thoughts while driving. Each item was categorized into 1 of 5 distinct subscales (Table 2). A frequency score was generated for each of the 5 subscales. Each subscale had good internal consistency and convergent, divergent, and predictive validity. The Coping Self-Instruction subscale, which is defined as engaging in relaxing thoughts to accept others’ driving behaviors, was of primary interest. It is a 9-item scale (frequency score can range from 9 to 45) with good reliability (α = .83).²³

Given the small and unequal sample sizes, nonparametric independent samples Mann-Whitney U-tests were selected to compare frequency of driving-related thoughts across veterans with comorbid PTSD and TBI and those of veterans without either PTSD or TBI.

Results

Descriptive statistics and results for each DATQ subscale are reported in Table 3. Group comparisons revealed that veterans with comorbid PTSD and TBI endorsed statistically significantly fewer coping self-instruction thoughts while driving (M = 11.5, SD = 7.2) than did combat veterans without either PTSD or TBI (M = 18.1, SD = 6.9; U = 56.0, P = .05). Conversely, frequency of angry thoughts were statistically significant in their difference as a function of PTSD or TBI diagnostic status.

Discussion

While driving, veterans with PTSD or TBI endorsed statistically significantly fewer coping self-instruction thoughts than did veterans without either PTSD or TBI. Prior research suggests that veterans with PTSD or TBI experience greater anxiety than do veterans without either condition while driving.^2,3 Taken together, this suggests that veterans with PTSD or TBI may lack efficient cognitive coping strategies related to the anxiety they experience while driving. Furthermore, the groups did not significantly differ in frequency of angry thoughts behind the wheel. This result was expected based on prior analyses that suggested that veterans with and without PTSD or TBI endorsed feelings of aggression, impatience, and frustration while driving at similar frequencies.³

Because all veterans in the current sample were exposed to combat, these results help to parse out the unique contribution of PTSD and TBI diagnoses on driving in civilian environments. Exposure to combat plus diagnoses of PTSD or TBI may be related to veterans’ ability to cope with typical driving situations at home. In the context of prior literature, results suggest that veterans with PTSD or TBI automatically may perceive neutral roadside stimuli as threatening, feel anxious in response to this perceived threat, and be ill-equipped to cope with this anxiety.^3,5,17,18 According to CBT models, negative automatic thoughts play a critical role in maintaining anxiety.²⁴ Particular cognitive distortions associated with PTSD symptomatology and combat driving experiences, such as misperceiving ambiguous stimuli as threatening because of an inability to suppress trauma-related schema and associations, may therefore maintain driving anxiety following military separation.

Research on CBT interventions suggests that cognitive restructuring, including coping self-instruction, are effective treatments to reduce anxiety.^22,24 The current findings suggest that combat veterans with PTSD and TBI who experience driving anxiety endorse significantly fewer coping self-instruction thoughts than do controls in response to anxiety-provoking driving situations. In fact, prior research suggests that a majority of veterans experiencing driving-related anxiety do not seek help for their symptoms, and many of those who do prefer to reach out to friends rather than mental health professionals.² However, due to their high levels of anxiety, these veterans likely would benefit from CBT interventions specifically targeted to coping strategies for civilian driving. These coping strategies should focus on recognizing that common roadside stimuli are not necessarily threatening in civilian environments. This type of cognitive restructuring may help veterans better manage anxiety while driving.

Limitations

The current study is limited by its small and unequal sample sizes and lack of a noncombat exposure comparison group. Additionally, while this study highlights a potential relationship between reduced cognitive coping strategies and behind-the-wheel anxiety in veterans with PTSD or TBI, causal inferences cannot be made. It is possible that individuals without coping strategies who are deployed to combat are more likely to develop PTSD or TBI. Being equipped with few coping strategies may then lead these veterans to experience greater anxiety while driving. Conversely, PTSD and TBI symptoms may prevent veterans from developing coping strategies over time.

Furthermore, the comorbid PTSD and TBI group was separated from the military for significantly longer than was the control group. Future studies using a longitudinal design could better examine the potential causal relationship between comorbid PTSD and TBI and coping and determine whether endorsement of coping self-instruction changes as a function of time since military separation.

Veterans in the current study report a variety of deployment experiences and locations. Methods of combat, type of vehicle, driving terrain, and prevalence of IEDs changed over the multiple post-9/11 military campaigns. Veterans who were deployed to Iraq in the mid-2000s were instructed to drive quickly and erratically to avoid IEDs and mortars, whereas veterans deployed in later years were taught to drive slowly and carefully to hunt for IEDs in heavily armored vehicles.³ Seventy-five percent of the veterans with PTSD or TBI in the current sample were deployed to Iraq in the early to mid-2000s, compared with 33% of the veterans without PTSD or TBI. Thus, the 2 groups in the current sample may have experienced different combat environments, which could impact how they perceived roadside stimuli. Future studies should recruit a larger and more balanced sample to better determine whether specific combat experiences impact coping strategies while driving.

Conclusion

To the best of the authors’ knowledge, the current study is the first to examine specific types of thoughts that veterans with and without PTSD or TBI experience while driving on civilian roads. Veterans with PTSD or TBI are not engaging in as many coping self-instruction thoughts behind the wheel, despite experiencing greater anxiety than that of veterans without either PTSD or TBI. Cognitive behavioral therapy interventions for anxiety include engaging in coping self-instruction during anxiety-provoking situations.²² Therefore, veterans with PTSD or TBI may benefit from learning targeted coping self-instruction thoughts that they can utilize when anxiety-provoking situations arise behind the wheel. Results suggest that clinicians should work with veterans with comorbid PTSD and TBI to develop specific coping self-instruction statements that they can utilize internally when faced with anxiety-provoking driving situations.

Acknowledgments
This study is the result of work supported by the Council on Brain Injury (grant #260472). The authors thank Dr. Rosette Biester for her guidance.

SAN DIEGO – It’s been possible for over 15 years for neurointensivists to measure the partial pressure of oxygen in the brain of patients following traumatic brain injury.

But the technology has not been widely adopted because there have been no high-quality data showing that it’s useful. As a result, in most hospitals, TBI treatment is guided mostly by intracranial pressure.

The evidence gap is being filled. In a recent phase 2 trial, there was a trend towards benefit when treatment was guided by both intracranial pressure and the brain oxygenation (Crit Care Med. 2017 Nov;45[11]:1907-14). The study was powered for nonfutility, not clinically meaningful change, but the National Institute of Neurological Disorders and Stroke has recently funded a 45-site, phase 3 trial that will definitively answer whether treatment protocols informed by both pressure and oxygen improve neurologic outcomes, said principal investigator Ramon Diaz-Arrastia, MD, PhD, a professor of neurology at the University of Pennsylvania, Philadelphia.

In an interview at the annual meeting of the American Neurological Association, he explained the work, and exactly how paying attention to brain oxygen levels changed treatment in the phase 2 study. It didn’t take anything unusual to maintain oxygen partial pressure above 20 mm Hg.

[email protected]

SAN DIEGO – It’s been possible for over 15 years for neurointensivists to measure the partial pressure of oxygen in the brain of patients following traumatic brain injury.

But the technology has not been widely adopted because there have been no high-quality data showing that it’s useful. As a result, in most hospitals, TBI treatment is guided mostly by intracranial pressure.

The evidence gap is being filled. In a recent phase 2 trial, there was a trend towards benefit when treatment was guided by both intracranial pressure and the brain oxygenation (Crit Care Med. 2017 Nov;45[11]:1907-14). The study was powered for nonfutility, not clinically meaningful change, but the National Institute of Neurological Disorders and Stroke has recently funded a 45-site, phase 3 trial that will definitively answer whether treatment protocols informed by both pressure and oxygen improve neurologic outcomes, said principal investigator Ramon Diaz-Arrastia, MD, PhD, a professor of neurology at the University of Pennsylvania, Philadelphia.

In an interview at the annual meeting of the American Neurological Association, he explained the work, and exactly how paying attention to brain oxygen levels changed treatment in the phase 2 study. It didn’t take anything unusual to maintain oxygen partial pressure above 20 mm Hg.

[email protected]

SAN DIEGO – It’s been possible for over 15 years for neurointensivists to measure the partial pressure of oxygen in the brain of patients following traumatic brain injury.

But the technology has not been widely adopted because there have been no high-quality data showing that it’s useful. As a result, in most hospitals, TBI treatment is guided mostly by intracranial pressure.

The evidence gap is being filled. In a recent phase 2 trial, there was a trend towards benefit when treatment was guided by both intracranial pressure and the brain oxygenation (Crit Care Med. 2017 Nov;45[11]:1907-14). The study was powered for nonfutility, not clinically meaningful change, but the National Institute of Neurological Disorders and Stroke has recently funded a 45-site, phase 3 trial that will definitively answer whether treatment protocols informed by both pressure and oxygen improve neurologic outcomes, said principal investigator Ramon Diaz-Arrastia, MD, PhD, a professor of neurology at the University of Pennsylvania, Philadelphia.

In an interview at the annual meeting of the American Neurological Association, he explained the work, and exactly how paying attention to brain oxygen levels changed treatment in the phase 2 study. It didn’t take anything unusual to maintain oxygen partial pressure above 20 mm Hg.

[email protected]

SAN DIEGO – The healthy brain is a master of autoregulation, continuously adjusting blood flow to meet metabolic demand.

But in traumatic brain injury, cerebrovascular reactivity (CVR) breaks down; blood vessels don’t dilate as they should to deliver nutrients and oxygen, leading to progressive neurologic decline.

Sildenafil (Viagra) – a vasodilator in injured blood vessels – might help, according to ongoing research at the University of Pennsylvania, Philadelphia.

Researchers there gave sildenafil to inpatients with persistent symptoms at least 6 months after traumatic brain injury and measured CVR by a novel MRI technique an hour later. “Sildenafil was able to correct the deficit in CVR in many cases. We are hopeful this could be a useful therapy,” said principal investigator Ramon Diaz-Arrastia, MD, a professor of neurology at the university.

He explained the work in an interview at annual meeting of the American Neurological Association. The next step is to see if sildenafil helps CVR in acute traumatic brain injury, and in people who have had multiple, mild brain traumas, including professional athletes.

[email protected]

SAN DIEGO – The healthy brain is a master of autoregulation, continuously adjusting blood flow to meet metabolic demand.

But in traumatic brain injury, cerebrovascular reactivity (CVR) breaks down; blood vessels don’t dilate as they should to deliver nutrients and oxygen, leading to progressive neurologic decline.

Sildenafil (Viagra) – a vasodilator in injured blood vessels – might help, according to ongoing research at the University of Pennsylvania, Philadelphia.

Researchers there gave sildenafil to inpatients with persistent symptoms at least 6 months after traumatic brain injury and measured CVR by a novel MRI technique an hour later. “Sildenafil was able to correct the deficit in CVR in many cases. We are hopeful this could be a useful therapy,” said principal investigator Ramon Diaz-Arrastia, MD, a professor of neurology at the university.

He explained the work in an interview at annual meeting of the American Neurological Association. The next step is to see if sildenafil helps CVR in acute traumatic brain injury, and in people who have had multiple, mild brain traumas, including professional athletes.

[email protected]

SAN DIEGO – The healthy brain is a master of autoregulation, continuously adjusting blood flow to meet metabolic demand.

But in traumatic brain injury, cerebrovascular reactivity (CVR) breaks down; blood vessels don’t dilate as they should to deliver nutrients and oxygen, leading to progressive neurologic decline.

Sildenafil (Viagra) – a vasodilator in injured blood vessels – might help, according to ongoing research at the University of Pennsylvania, Philadelphia.

Researchers there gave sildenafil to inpatients with persistent symptoms at least 6 months after traumatic brain injury and measured CVR by a novel MRI technique an hour later. “Sildenafil was able to correct the deficit in CVR in many cases. We are hopeful this could be a useful therapy,” said principal investigator Ramon Diaz-Arrastia, MD, a professor of neurology at the university.

He explained the work in an interview at annual meeting of the American Neurological Association. The next step is to see if sildenafil helps CVR in acute traumatic brain injury, and in people who have had multiple, mild brain traumas, including professional athletes.

[email protected]

In a case series of 202 former football players whose brains were donated for research, 87% of the participants had neuropathologic evidence of chronic traumatic encephalopathy (CTE), according to a study published in the July 25 issue of JAMA. Among 111 players who played in the National Football League (NFL), 99% had CTE. A progressive clinical course was common in players with mild and severe CTE pathology. The results suggest that CTE may be related to prior participation in football, the researchers said.

The report by Jesse Mez, MD, MS, Assistant Professor of Neurology at Boston University, and colleagues describes the largest CTE case series to date. A limitation of the study, however, is that brain donation programs are associated with ascertainment bias. Awareness of a possible link between repetitive head trauma and CTE may have motivated players with signs of brain injury and their families to participate in the study. “Therefore, caution must be used in interpreting the high frequency of CTE in this sample, and estimates of prevalence cannot be concluded or implied from this sample,” Dr. Mez and colleagues said.

Findings From a Brain Bank

CTE is a progressive neurodegenerative disease associated with repetitive head trauma. To study the neuropathology and clinical presentation of brain donors with exposure to repetitive head trauma, investigators in 2008 established the Veterans Affairs–Boston University–Concussion Legacy Foundation Brain Bank.

The present study assessed donors who participated in American football at any level of play. Outcomes included neuropathologic diagnoses of neurodegenerative diseases, including CTE; CTE neuropathologic severity; and informant-reported athletic history and clinical presentation.

Investigators conducted retrospective telephone clinical assessments with informants to determine participants’ clinical presentations, including timelines of behavior, mood, and cognitive symptoms. Neither the researchers nor the informants knew the participants’ neuropathology during the interview. Online questionnaires ascertained participants’ athletic and military histories. Pathologists were blinded to exposure data and clinical information.

Level of Play

Among the 202 former football players (median age at death, 66), CTE was neuropathologically diagnosed in 177 players. Participants with CTE had played football for a mean of 15.1 years.

Investigators diagnosed CTE in three of 14 players (21%) whose highest level of play was at the high school level, 48 of 53 players (91%) who played at the college level, nine of 14 players (64%) who played at the semiprofessional level, seven of eight players (88%) who played in the Canadian Football League, and 110 of 111 players (99%) who played in the NFL. Pathologists did not diagnose CTE in two participants whose highest level of play was before high school.

The three players with CTE whose highest level of play was in high school had mild CTE pathology (ie, stage I or II), whereas the majority of former college, semiprofessional, and professional players had severe pathology (ie, stage III or IV).

Among the 111 CTE cases with standardized informant reports on clinical symptoms, a progressive clinical course was reported in 85% of participants with mild CTE pathology and in 100% of participants with severe CTE pathology.

Among the 27 players with mild CTE pathology, 96% had behavioral or mood symptoms or both, 85% had cognitive symptoms, and 33% had signs of dementia. Among the 84 players with severe CTE pathology, 89% had behavioral or mood symptoms or both, 95% had cognitive symptoms, and 85% had signs of dementia.

“Nearly all of the former NFL players in this study had CTE pathology, and this pathology was frequently severe,” Dr. Mez and colleagues said. “These findings suggest that CTE may be related to prior participation in football and that a high level of play may be related to substantial disease burden.”

Future studies should assess how factors such as age at first exposure to football, duration of play, player position, cumulative hits, and linear and rotational acceleration of hits may influence outcomes, the researchers said.

Opportunities for Symptomatic Treatment

The rate of symptomatic CTE may be lower in an unselected population of former football players, said Gil D. Rabinovici, MD, Professor of Neurology at the University of California, San Francisco, in an accompanying editorial.

“The prevalence of cognitive and behavioral symptoms in the autopsy cohort was 88% and 95%, respectively,” he said. “In contrast, questionnaire-based ascertainment of neuropsychiatric symptoms among retired NFL players found that the prevalence of memory symptoms and depression was 5% to 20%. Acknowledging that questionnaires are an insensitive method for detecting neurodegenerative disease, the large discrepancy suggests that the rates of symptomatic CTE may be lower in an unselected cohort of former players.”

In addition, this study and prior studies suggest that there may be opportunities to improve care of patients with CTE. “Potentially treatable contributing factors are found in many patients, including high rates of substance abuse, affective disorders, headaches, and sleep disturbances,” Dr. Rabinovici said. “Thus, at-risk patients may benefit from a multidisciplinary medical team to optimize symptomatic treatment and maximize patient function and quality of life.”

—Jake Remaly

Suggested Reading

Mez J, Daneshvar DH, Kiernan PT, et al. Clinicopathological evaluation of chronic traumatic encephalopathy in players of American football. JAMA. 2017;318(4):360-370.

Rabinovici GD. Advances and gaps in understanding chronic traumatic encephalopathy: From pugilists to American football players. JAMA. 2017;318(4):338-340.

In a case series of 202 former football players whose brains were donated for research, 87% of the participants had neuropathologic evidence of chronic traumatic encephalopathy (CTE), according to a study published in the July 25 issue of JAMA. Among 111 players who played in the National Football League (NFL), 99% had CTE. A progressive clinical course was common in players with mild and severe CTE pathology. The results suggest that CTE may be related to prior participation in football, the researchers said.

The report by Jesse Mez, MD, MS, Assistant Professor of Neurology at Boston University, and colleagues describes the largest CTE case series to date. A limitation of the study, however, is that brain donation programs are associated with ascertainment bias. Awareness of a possible link between repetitive head trauma and CTE may have motivated players with signs of brain injury and their families to participate in the study. “Therefore, caution must be used in interpreting the high frequency of CTE in this sample, and estimates of prevalence cannot be concluded or implied from this sample,” Dr. Mez and colleagues said.

Findings From a Brain Bank

CTE is a progressive neurodegenerative disease associated with repetitive head trauma. To study the neuropathology and clinical presentation of brain donors with exposure to repetitive head trauma, investigators in 2008 established the Veterans Affairs–Boston University–Concussion Legacy Foundation Brain Bank.

The present study assessed donors who participated in American football at any level of play. Outcomes included neuropathologic diagnoses of neurodegenerative diseases, including CTE; CTE neuropathologic severity; and informant-reported athletic history and clinical presentation.

Investigators conducted retrospective telephone clinical assessments with informants to determine participants’ clinical presentations, including timelines of behavior, mood, and cognitive symptoms. Neither the researchers nor the informants knew the participants’ neuropathology during the interview. Online questionnaires ascertained participants’ athletic and military histories. Pathologists were blinded to exposure data and clinical information.

Level of Play

Among the 202 former football players (median age at death, 66), CTE was neuropathologically diagnosed in 177 players. Participants with CTE had played football for a mean of 15.1 years.

Investigators diagnosed CTE in three of 14 players (21%) whose highest level of play was at the high school level, 48 of 53 players (91%) who played at the college level, nine of 14 players (64%) who played at the semiprofessional level, seven of eight players (88%) who played in the Canadian Football League, and 110 of 111 players (99%) who played in the NFL. Pathologists did not diagnose CTE in two participants whose highest level of play was before high school.

The three players with CTE whose highest level of play was in high school had mild CTE pathology (ie, stage I or II), whereas the majority of former college, semiprofessional, and professional players had severe pathology (ie, stage III or IV).

Among the 111 CTE cases with standardized informant reports on clinical symptoms, a progressive clinical course was reported in 85% of participants with mild CTE pathology and in 100% of participants with severe CTE pathology.

Among the 27 players with mild CTE pathology, 96% had behavioral or mood symptoms or both, 85% had cognitive symptoms, and 33% had signs of dementia. Among the 84 players with severe CTE pathology, 89% had behavioral or mood symptoms or both, 95% had cognitive symptoms, and 85% had signs of dementia.

“Nearly all of the former NFL players in this study had CTE pathology, and this pathology was frequently severe,” Dr. Mez and colleagues said. “These findings suggest that CTE may be related to prior participation in football and that a high level of play may be related to substantial disease burden.”

Future studies should assess how factors such as age at first exposure to football, duration of play, player position, cumulative hits, and linear and rotational acceleration of hits may influence outcomes, the researchers said.

Opportunities for Symptomatic Treatment

The rate of symptomatic CTE may be lower in an unselected population of former football players, said Gil D. Rabinovici, MD, Professor of Neurology at the University of California, San Francisco, in an accompanying editorial.

“The prevalence of cognitive and behavioral symptoms in the autopsy cohort was 88% and 95%, respectively,” he said. “In contrast, questionnaire-based ascertainment of neuropsychiatric symptoms among retired NFL players found that the prevalence of memory symptoms and depression was 5% to 20%. Acknowledging that questionnaires are an insensitive method for detecting neurodegenerative disease, the large discrepancy suggests that the rates of symptomatic CTE may be lower in an unselected cohort of former players.”

In addition, this study and prior studies suggest that there may be opportunities to improve care of patients with CTE. “Potentially treatable contributing factors are found in many patients, including high rates of substance abuse, affective disorders, headaches, and sleep disturbances,” Dr. Rabinovici said. “Thus, at-risk patients may benefit from a multidisciplinary medical team to optimize symptomatic treatment and maximize patient function and quality of life.”

—Jake Remaly

Suggested Reading

Mez J, Daneshvar DH, Kiernan PT, et al. Clinicopathological evaluation of chronic traumatic encephalopathy in players of American football. JAMA. 2017;318(4):360-370.

Rabinovici GD. Advances and gaps in understanding chronic traumatic encephalopathy: From pugilists to American football players. JAMA. 2017;318(4):338-340.

In a case series of 202 former football players whose brains were donated for research, 87% of the participants had neuropathologic evidence of chronic traumatic encephalopathy (CTE), according to a study published in the July 25 issue of JAMA. Among 111 players who played in the National Football League (NFL), 99% had CTE. A progressive clinical course was common in players with mild and severe CTE pathology. The results suggest that CTE may be related to prior participation in football, the researchers said.

The report by Jesse Mez, MD, MS, Assistant Professor of Neurology at Boston University, and colleagues describes the largest CTE case series to date. A limitation of the study, however, is that brain donation programs are associated with ascertainment bias. Awareness of a possible link between repetitive head trauma and CTE may have motivated players with signs of brain injury and their families to participate in the study. “Therefore, caution must be used in interpreting the high frequency of CTE in this sample, and estimates of prevalence cannot be concluded or implied from this sample,” Dr. Mez and colleagues said.

Findings From a Brain Bank

CTE is a progressive neurodegenerative disease associated with repetitive head trauma. To study the neuropathology and clinical presentation of brain donors with exposure to repetitive head trauma, investigators in 2008 established the Veterans Affairs–Boston University–Concussion Legacy Foundation Brain Bank.

The present study assessed donors who participated in American football at any level of play. Outcomes included neuropathologic diagnoses of neurodegenerative diseases, including CTE; CTE neuropathologic severity; and informant-reported athletic history and clinical presentation.

Investigators conducted retrospective telephone clinical assessments with informants to determine participants’ clinical presentations, including timelines of behavior, mood, and cognitive symptoms. Neither the researchers nor the informants knew the participants’ neuropathology during the interview. Online questionnaires ascertained participants’ athletic and military histories. Pathologists were blinded to exposure data and clinical information.

Level of Play

Among the 202 former football players (median age at death, 66), CTE was neuropathologically diagnosed in 177 players. Participants with CTE had played football for a mean of 15.1 years.

Investigators diagnosed CTE in three of 14 players (21%) whose highest level of play was at the high school level, 48 of 53 players (91%) who played at the college level, nine of 14 players (64%) who played at the semiprofessional level, seven of eight players (88%) who played in the Canadian Football League, and 110 of 111 players (99%) who played in the NFL. Pathologists did not diagnose CTE in two participants whose highest level of play was before high school.

The three players with CTE whose highest level of play was in high school had mild CTE pathology (ie, stage I or II), whereas the majority of former college, semiprofessional, and professional players had severe pathology (ie, stage III or IV).

Among the 111 CTE cases with standardized informant reports on clinical symptoms, a progressive clinical course was reported in 85% of participants with mild CTE pathology and in 100% of participants with severe CTE pathology.

Among the 27 players with mild CTE pathology, 96% had behavioral or mood symptoms or both, 85% had cognitive symptoms, and 33% had signs of dementia. Among the 84 players with severe CTE pathology, 89% had behavioral or mood symptoms or both, 95% had cognitive symptoms, and 85% had signs of dementia.

“Nearly all of the former NFL players in this study had CTE pathology, and this pathology was frequently severe,” Dr. Mez and colleagues said. “These findings suggest that CTE may be related to prior participation in football and that a high level of play may be related to substantial disease burden.”

Future studies should assess how factors such as age at first exposure to football, duration of play, player position, cumulative hits, and linear and rotational acceleration of hits may influence outcomes, the researchers said.

Opportunities for Symptomatic Treatment

The rate of symptomatic CTE may be lower in an unselected population of former football players, said Gil D. Rabinovici, MD, Professor of Neurology at the University of California, San Francisco, in an accompanying editorial.

“The prevalence of cognitive and behavioral symptoms in the autopsy cohort was 88% and 95%, respectively,” he said. “In contrast, questionnaire-based ascertainment of neuropsychiatric symptoms among retired NFL players found that the prevalence of memory symptoms and depression was 5% to 20%. Acknowledging that questionnaires are an insensitive method for detecting neurodegenerative disease, the large discrepancy suggests that the rates of symptomatic CTE may be lower in an unselected cohort of former players.”

In addition, this study and prior studies suggest that there may be opportunities to improve care of patients with CTE. “Potentially treatable contributing factors are found in many patients, including high rates of substance abuse, affective disorders, headaches, and sleep disturbances,” Dr. Rabinovici said. “Thus, at-risk patients may benefit from a multidisciplinary medical team to optimize symptomatic treatment and maximize patient function and quality of life.”

—Jake Remaly

Suggested Reading

Mez J, Daneshvar DH, Kiernan PT, et al. Clinicopathological evaluation of chronic traumatic encephalopathy in players of American football. JAMA. 2017;318(4):360-370.

Rabinovici GD. Advances and gaps in understanding chronic traumatic encephalopathy: From pugilists to American football players. JAMA. 2017;318(4):338-340.

Take a brand-new research facility, then add a neighboring U.S. Army base with one of the largest veteran populations of any health care network and a world-class team of researchers—that’s a “recipe for success,” says Dr. Michael Russell, director of the VA Center of Excellence for Research on Returning War Veterans in Waco, Texas.

The 53,000-square-foot center is designed to conduct state-of-the-art research on mental health problems associated with PTSD and TBI, “signature wounds” of conflicts in Afghanistan and the Middle East. The flagship study is named Project MAVEREX. Researchers will examine whether the inability of the regions in injured brains to communicate with one another worsens behavior outcomes. Using “cutting-edge data analysis techniques,” they hope to characterize the effects of TBI on brain structure and function “with very high precision,” says Dr. Evan Gordon, a cognitive neuroscientist working on MAVEREX.

The Center of Excellence is on the campus of the historic Doris Miller VAMC. The facility has space for 75 staff members and faculty as well as 25 trainees. It features multiple examination rooms, observation rooms, electrocardiography, electroencephalography, a 3 Tesla MRI, a transcranial magnetic stimulation suite, and a custom-built laboratory wing.

Take a brand-new research facility, then add a neighboring U.S. Army base with one of the largest veteran populations of any health care network and a world-class team of researchers—that’s a “recipe for success,” says Dr. Michael Russell, director of the VA Center of Excellence for Research on Returning War Veterans in Waco, Texas.

The 53,000-square-foot center is designed to conduct state-of-the-art research on mental health problems associated with PTSD and TBI, “signature wounds” of conflicts in Afghanistan and the Middle East. The flagship study is named Project MAVEREX. Researchers will examine whether the inability of the regions in injured brains to communicate with one another worsens behavior outcomes. Using “cutting-edge data analysis techniques,” they hope to characterize the effects of TBI on brain structure and function “with very high precision,” says Dr. Evan Gordon, a cognitive neuroscientist working on MAVEREX.

The Center of Excellence is on the campus of the historic Doris Miller VAMC. The facility has space for 75 staff members and faculty as well as 25 trainees. It features multiple examination rooms, observation rooms, electrocardiography, electroencephalography, a 3 Tesla MRI, a transcranial magnetic stimulation suite, and a custom-built laboratory wing.

Take a brand-new research facility, then add a neighboring U.S. Army base with one of the largest veteran populations of any health care network and a world-class team of researchers—that’s a “recipe for success,” says Dr. Michael Russell, director of the VA Center of Excellence for Research on Returning War Veterans in Waco, Texas.

The 53,000-square-foot center is designed to conduct state-of-the-art research on mental health problems associated with PTSD and TBI, “signature wounds” of conflicts in Afghanistan and the Middle East. The flagship study is named Project MAVEREX. Researchers will examine whether the inability of the regions in injured brains to communicate with one another worsens behavior outcomes. Using “cutting-edge data analysis techniques,” they hope to characterize the effects of TBI on brain structure and function “with very high precision,” says Dr. Evan Gordon, a cognitive neuroscientist working on MAVEREX.

The Center of Excellence is on the campus of the historic Doris Miller VAMC. The facility has space for 75 staff members and faculty as well as 25 trainees. It features multiple examination rooms, observation rooms, electrocardiography, electroencephalography, a 3 Tesla MRI, a transcranial magnetic stimulation suite, and a custom-built laboratory wing.

Eye tracking is a noninvasive technique that may help to assess two key physiologic signs of concussion, intracranial pressure (ICP) and ocular motility dysfunction, according to a study published online ahead of print June 2 in the Journal of Neurosurgery. This technique does not require a trained examiner, pupil dilation, imaging studies, or an invasive procedure such as lumbar or ventricular puncture, the authors noted.

“With these data, we are presenting a new application for eye-tracking technology, as well as a new mechanism for assessment of elevated ICP that is noninvasive, automatable, and could potentially be performed and analyzed remotely,” said Uzma Samadani, MD, PhD, Associate Professor of Neurosurgery at the University of Minnesota in Minneapolis, and colleagues.

The boundaries of normal and elevated intracranial pressure vary between patients, said the authors. People with elevated intracranial pressure can develop abnormalities in global cerebral functioning. Elevated ICP can also affect the function of cranial nerves, which may contribute to ocular dysmotility. Dr. Samadani and colleagues assessed the impact of elevated ICP on eye-tracking sessions performed while patients watched a short film clip.

Eligible participants ranged in age from 18 to 70, were admitted to the Bellevue Hospital neurosurgical intensive care unit in New York City with vision correctable to within 20/500 bilaterally, and had denied a history of ocular dysmotility. In addition, these patients were conscious and able to communicate and to provide an ophthalmologic, medical, and neurologic history, as well as medications, drugs, and alcohol consumed within 24 hours prior to eye tracking.

Awake patients who required placement of an ICP monitor for clinical purposes underwent eye tracking while watching a 220-second continuously playing video. The investigators recorded pupil position at 500 Hz and calculated metrics associated with each eye individually and both eyes together. In addition, the researchers performed linear regression with generalized estimating equations to test the association of eye-tracking metrics with changes in ICP.

The investigators performed eye tracking at ICP levels ranging from –3 mm Hg to 30 mm Hg in 23 patients (12 women, mean age 46.8) on 55 occasions. Eye-tracking measures correlating with cranial nerve function decreased linearly with increasing ICP.

Researchers also found that measures for cranial nerve VI were the most prominently affected. The area under the curve for eye-tracking metrics to discriminate between an ICP <12 mm Hg and one of ≥12 mm Hg was 0.798. To discriminate between an ICP <15 mm Hg and one of ≥15 mm Hg, the area under the curve was 0.833. Finally, to discriminate between an ICP <20 mm Hg and ≥20 mm Hg, the area under the curve was 0.889.

Overall, increasingly elevated ICP was associated with increasingly abnormal eye tracking detected while patients were watching the short film. The “technology has clinical applications for assessment of shunt malfunction, pseudotumor cerebri, concussion, and prevention of second-impact syndrome,” said Dr. Samadani and colleagues.

The major limitation of this study was the lack of continuous data in patients with higher ICP recordings, the authors said. Few patients with elevated ICP could open their eyes long enough to undergo eye tracking.

—Erica Tricarico

Suggested Reading

Kolecki R, Dammavalam V, Zahid A, et al. Elevated intracranial pressure and reversible eye-tracking changes detected while viewing a film clip. J Neurosurg. 2017 Jun 2 [Epub ahead of print].

Eye tracking is a noninvasive technique that may help to assess two key physiologic signs of concussion, intracranial pressure (ICP) and ocular motility dysfunction, according to a study published online ahead of print June 2 in the Journal of Neurosurgery. This technique does not require a trained examiner, pupil dilation, imaging studies, or an invasive procedure such as lumbar or ventricular puncture, the authors noted.

“With these data, we are presenting a new application for eye-tracking technology, as well as a new mechanism for assessment of elevated ICP that is noninvasive, automatable, and could potentially be performed and analyzed remotely,” said Uzma Samadani, MD, PhD, Associate Professor of Neurosurgery at the University of Minnesota in Minneapolis, and colleagues.

The boundaries of normal and elevated intracranial pressure vary between patients, said the authors. People with elevated intracranial pressure can develop abnormalities in global cerebral functioning. Elevated ICP can also affect the function of cranial nerves, which may contribute to ocular dysmotility. Dr. Samadani and colleagues assessed the impact of elevated ICP on eye-tracking sessions performed while patients watched a short film clip.

Eligible participants ranged in age from 18 to 70, were admitted to the Bellevue Hospital neurosurgical intensive care unit in New York City with vision correctable to within 20/500 bilaterally, and had denied a history of ocular dysmotility. In addition, these patients were conscious and able to communicate and to provide an ophthalmologic, medical, and neurologic history, as well as medications, drugs, and alcohol consumed within 24 hours prior to eye tracking.

Awake patients who required placement of an ICP monitor for clinical purposes underwent eye tracking while watching a 220-second continuously playing video. The investigators recorded pupil position at 500 Hz and calculated metrics associated with each eye individually and both eyes together. In addition, the researchers performed linear regression with generalized estimating equations to test the association of eye-tracking metrics with changes in ICP.

The investigators performed eye tracking at ICP levels ranging from –3 mm Hg to 30 mm Hg in 23 patients (12 women, mean age 46.8) on 55 occasions. Eye-tracking measures correlating with cranial nerve function decreased linearly with increasing ICP.

Researchers also found that measures for cranial nerve VI were the most prominently affected. The area under the curve for eye-tracking metrics to discriminate between an ICP <12 mm Hg and one of ≥12 mm Hg was 0.798. To discriminate between an ICP <15 mm Hg and one of ≥15 mm Hg, the area under the curve was 0.833. Finally, to discriminate between an ICP <20 mm Hg and ≥20 mm Hg, the area under the curve was 0.889.

Overall, increasingly elevated ICP was associated with increasingly abnormal eye tracking detected while patients were watching the short film. The “technology has clinical applications for assessment of shunt malfunction, pseudotumor cerebri, concussion, and prevention of second-impact syndrome,” said Dr. Samadani and colleagues.

The major limitation of this study was the lack of continuous data in patients with higher ICP recordings, the authors said. Few patients with elevated ICP could open their eyes long enough to undergo eye tracking.

—Erica Tricarico

Suggested Reading

Kolecki R, Dammavalam V, Zahid A, et al. Elevated intracranial pressure and reversible eye-tracking changes detected while viewing a film clip. J Neurosurg. 2017 Jun 2 [Epub ahead of print].

Eye tracking is a noninvasive technique that may help to assess two key physiologic signs of concussion, intracranial pressure (ICP) and ocular motility dysfunction, according to a study published online ahead of print June 2 in the Journal of Neurosurgery. This technique does not require a trained examiner, pupil dilation, imaging studies, or an invasive procedure such as lumbar or ventricular puncture, the authors noted.

“With these data, we are presenting a new application for eye-tracking technology, as well as a new mechanism for assessment of elevated ICP that is noninvasive, automatable, and could potentially be performed and analyzed remotely,” said Uzma Samadani, MD, PhD, Associate Professor of Neurosurgery at the University of Minnesota in Minneapolis, and colleagues.

The boundaries of normal and elevated intracranial pressure vary between patients, said the authors. People with elevated intracranial pressure can develop abnormalities in global cerebral functioning. Elevated ICP can also affect the function of cranial nerves, which may contribute to ocular dysmotility. Dr. Samadani and colleagues assessed the impact of elevated ICP on eye-tracking sessions performed while patients watched a short film clip.

Eligible participants ranged in age from 18 to 70, were admitted to the Bellevue Hospital neurosurgical intensive care unit in New York City with vision correctable to within 20/500 bilaterally, and had denied a history of ocular dysmotility. In addition, these patients were conscious and able to communicate and to provide an ophthalmologic, medical, and neurologic history, as well as medications, drugs, and alcohol consumed within 24 hours prior to eye tracking.

Awake patients who required placement of an ICP monitor for clinical purposes underwent eye tracking while watching a 220-second continuously playing video. The investigators recorded pupil position at 500 Hz and calculated metrics associated with each eye individually and both eyes together. In addition, the researchers performed linear regression with generalized estimating equations to test the association of eye-tracking metrics with changes in ICP.

The investigators performed eye tracking at ICP levels ranging from –3 mm Hg to 30 mm Hg in 23 patients (12 women, mean age 46.8) on 55 occasions. Eye-tracking measures correlating with cranial nerve function decreased linearly with increasing ICP.

Researchers also found that measures for cranial nerve VI were the most prominently affected. The area under the curve for eye-tracking metrics to discriminate between an ICP <12 mm Hg and one of ≥12 mm Hg was 0.798. To discriminate between an ICP <15 mm Hg and one of ≥15 mm Hg, the area under the curve was 0.833. Finally, to discriminate between an ICP <20 mm Hg and ≥20 mm Hg, the area under the curve was 0.889.

Overall, increasingly elevated ICP was associated with increasingly abnormal eye tracking detected while patients were watching the short film. The “technology has clinical applications for assessment of shunt malfunction, pseudotumor cerebri, concussion, and prevention of second-impact syndrome,” said Dr. Samadani and colleagues.

The major limitation of this study was the lack of continuous data in patients with higher ICP recordings, the authors said. Few patients with elevated ICP could open their eyes long enough to undergo eye tracking.

—Erica Tricarico

Suggested Reading

Kolecki R, Dammavalam V, Zahid A, et al. Elevated intracranial pressure and reversible eye-tracking changes detected while viewing a film clip. J Neurosurg. 2017 Jun 2 [Epub ahead of print].

In the Madigan Intrepid Spirit Transitions (MIST) program, holistic treatment for traumatic brain injuries (TBIs) includes traditional and nontraditional therapies as well as a little help from friends.

MIST is a 6-week intensive outpatient group for service members who have TBIs and other traumatic injuries, along with coexisting conditions, such as chronic pain or posttraumatic stress. Coexisting conditions can make cases more complex, said U.S. Army Colonel Beverly Scott, medical and program director of Madigan Army Medical Center’s Traumatic Brain Injury Program and Intrepid Spirit Program in an interview with Health.mil News. But she adds, “It’s never too late to help [patients] address a number of issues they may be having following a traumatic brain injury, dealing with pain, dealing with behavior health issues.”

Related: Let’s Dance: A Holistic Approach to Treating Veterans With Posttraumatic Stress Disorder

The MIST program serves only active-duty service members with referral from their primary care managers and other specialty services at Madigan or throughout the Regional Health Command-Pacific. Commanders must sign memoranda of understanding that patients will be off duty rosters for the duration of the program. “They’re making a commitment to help that service member get better,” Scott said.

The MIST program enrolls 8 to 12 service members at a time. The holistic focus allows patients to address chronic pain, insomnia, and cognitive issues through traditional means as well as less traditional means that include mindfulness training; art; such as creating symbolic masks; and yoga. The variety of approaches lets them “cherry pick the methods they believe will help them the most,” the Health.mil News article reports, or what one member called “customizing their own multitool.”

Participants are encouraged to continue individual care within the TBI/Intrepid Spirit program. The MIST program aims to introduce them to the resources they can use going forward. Giving them tools they can use after they complete the program is an acknowledgment that the recovery process is ongoing. “We recognize it is a transition,” Scott said.

Related: Ideas for Helping TBI Patients

The MIST program has graduated 2 groups. Scott says, “We’ve seen incredible success,” both in wellness and in other areas, such as improved interpersonal relationships. Some of the credit goes to the peer support that MIST promotes. The curriculum is evidence based, but Scott says some “significant success is clearly related to soldiers helping soldiers.”

In the Madigan Intrepid Spirit Transitions (MIST) program, holistic treatment for traumatic brain injuries (TBIs) includes traditional and nontraditional therapies as well as a little help from friends.

MIST is a 6-week intensive outpatient group for service members who have TBIs and other traumatic injuries, along with coexisting conditions, such as chronic pain or posttraumatic stress. Coexisting conditions can make cases more complex, said U.S. Army Colonel Beverly Scott, medical and program director of Madigan Army Medical Center’s Traumatic Brain Injury Program and Intrepid Spirit Program in an interview with Health.mil News. But she adds, “It’s never too late to help [patients] address a number of issues they may be having following a traumatic brain injury, dealing with pain, dealing with behavior health issues.”

Related: Let’s Dance: A Holistic Approach to Treating Veterans With Posttraumatic Stress Disorder

The MIST program serves only active-duty service members with referral from their primary care managers and other specialty services at Madigan or throughout the Regional Health Command-Pacific. Commanders must sign memoranda of understanding that patients will be off duty rosters for the duration of the program. “They’re making a commitment to help that service member get better,” Scott said.

The MIST program enrolls 8 to 12 service members at a time. The holistic focus allows patients to address chronic pain, insomnia, and cognitive issues through traditional means as well as less traditional means that include mindfulness training; art; such as creating symbolic masks; and yoga. The variety of approaches lets them “cherry pick the methods they believe will help them the most,” the Health.mil News article reports, or what one member called “customizing their own multitool.”

Participants are encouraged to continue individual care within the TBI/Intrepid Spirit program. The MIST program aims to introduce them to the resources they can use going forward. Giving them tools they can use after they complete the program is an acknowledgment that the recovery process is ongoing. “We recognize it is a transition,” Scott said.

Related: Ideas for Helping TBI Patients

The MIST program has graduated 2 groups. Scott says, “We’ve seen incredible success,” both in wellness and in other areas, such as improved interpersonal relationships. Some of the credit goes to the peer support that MIST promotes. The curriculum is evidence based, but Scott says some “significant success is clearly related to soldiers helping soldiers.”

In the Madigan Intrepid Spirit Transitions (MIST) program, holistic treatment for traumatic brain injuries (TBIs) includes traditional and nontraditional therapies as well as a little help from friends.

MIST is a 6-week intensive outpatient group for service members who have TBIs and other traumatic injuries, along with coexisting conditions, such as chronic pain or posttraumatic stress. Coexisting conditions can make cases more complex, said U.S. Army Colonel Beverly Scott, medical and program director of Madigan Army Medical Center’s Traumatic Brain Injury Program and Intrepid Spirit Program in an interview with Health.mil News. But she adds, “It’s never too late to help [patients] address a number of issues they may be having following a traumatic brain injury, dealing with pain, dealing with behavior health issues.”

Related: Let’s Dance: A Holistic Approach to Treating Veterans With Posttraumatic Stress Disorder

The MIST program serves only active-duty service members with referral from their primary care managers and other specialty services at Madigan or throughout the Regional Health Command-Pacific. Commanders must sign memoranda of understanding that patients will be off duty rosters for the duration of the program. “They’re making a commitment to help that service member get better,” Scott said.

The MIST program enrolls 8 to 12 service members at a time. The holistic focus allows patients to address chronic pain, insomnia, and cognitive issues through traditional means as well as less traditional means that include mindfulness training; art; such as creating symbolic masks; and yoga. The variety of approaches lets them “cherry pick the methods they believe will help them the most,” the Health.mil News article reports, or what one member called “customizing their own multitool.”

Participants are encouraged to continue individual care within the TBI/Intrepid Spirit program. The MIST program aims to introduce them to the resources they can use going forward. Giving them tools they can use after they complete the program is an acknowledgment that the recovery process is ongoing. “We recognize it is a transition,” Scott said.

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The MIST program has graduated 2 groups. Scott says, “We’ve seen incredible success,” both in wellness and in other areas, such as improved interpersonal relationships. Some of the credit goes to the peer support that MIST promotes. The curriculum is evidence based, but Scott says some “significant success is clearly related to soldiers helping soldiers.”