Neuroanatomic basis of impaired self-awareness after traumatic brain injury: findings from early computed tomography

BACKGROUND: Impaired self-awareness (ISA) is common among patients with severe traumatic brain injury (TBI) and contributes to poorer functional outcome. There is keen interest in improving the understanding of this disorder as the neuroanatomic substrate of posttraumatic ISA is poorly understood. OBJECTIVE: Determine whether (1) greater number of brain lesions, (2) greater volume of right hemisphere lesions, or (3) greater volume of frontal lesions is associated with greater levels of ISA after TBI. DESIGN: Prospective, observational study. PARTICIPANTS: Ninety-one TBI admissions to one of 2 National Institute on Disability and Rehabilitation Research TBI Model System (TBIMS) programs. Subjects met TBIMS inclusion criteria plus (1) resolution of posttraumatic amnesia (PTA) prior to rehabilitation discharge and (2) initial postinjury computerized tomography (CT) scan available as a hard copy and as an electronic file. METHODS: CT scan lesions outlined by a board-certified neuroradiologist were measured using NIH Image, and resulting calculated lesion volumes/scan variables compared against demographic characteristics, TBI severity variables, and ISA variables measured by the Awareness Questionnaire (AQ) at the time of PTA resolution. RESULTS: Most subjects (78%) had at least 1 lesion on emergent CT, and contusion volumes varied in all regions of interest. Patients rated their functioning as more intact on the AQ than ratings of treating clinicians, consistent with ISA. Greater injury severity was associated with a greater degree of ISA. Multivariable linear regression revealed that, after adjustment for other predictors, the number of brain lesions was predictive of degree of ISA. Right hemisphere contusion or frontal lobe contusion volumes, however, were not predictive of degree of ISA. CONCLUSIONS: ISA was significantly associated with the number, but not with location or volume of focal lesions early after TBI. Posttraumatic ISA may reflect disruption in the integrated operation of broadly distributed neural networks, with lesion burden in any specific region being less relevant than disruption across multiple regions. Further imaging research is warranted to confirm these findings and to provide insight into the distributed networks required for self-awareness.     

Computed tomography findings and early cognitive outcome after traumatic brain injury

Primary objective: To examine the relationship between CT abnormalities and early neuropsychological outcome following traumatic brain injury (TBI) using quantitative CT analyses, data reduction methods for neuropsychological results and specific hypotheses based on literature review.

Research design: Observational, prospective cohort study using acute (emergency) CT data and neuropsychological test data from 89 participants with TBI who were hospitalized for rehabilitation.

Methods and procedures: Principal components analysis with varimax rotation was used to reduce data from a standard battery of eight neuropsychological tests administered after clearance of post-traumatic amnesia (1 month post-TBI on average). Bivariate correlations were used to examine relationships of three factors (verbal memory, cognitive processing speed and verbal working memory) to quantitative volumetric analysis of CT scan abnormalities (size, number and location). Specific hypotheses as to CT predictors of poor performance on each factor were tested using multivariable linear regression that included injury severity and demographic variables.

Main results: Eighty-nine per cent of participants had some pathology on initial CT. Age, education and time to follow commands (TFC), an index of overall injury severity, were significantly associated with the neuropsychological factors. However, none of the specific hypotheses about CT scan variables and cognitive outcome were strongly supported by the data. There was a trend for any CT abnormality to predict slower speed of processing and for higher number of brain lesions to predict worse memory performance.

Conclusions: Despite the precision added by quantitative CT analysis, CT findings did not improve on demographic factors and TFC in predicting early cognitive outcome of TBI. Imaging methods that are more sensitive to white matter integrity may be needed to develop pathophysiologic predictors of TBI outcome.     

Outcome after mild-to-moderate blunt head injury: effects of focal lesions and diffuse axonal injury

Primary objective: A comparison of the effects of focal and diffuse axonal injury in mild-to-moderate traumatic brain injury (TBI). Research design: In a prospective longitudinal study of 138 consecutive patients suffering from TBI who were admitted to the Magdeburg University Hospital, 60 could be assessed neuropsychologically 8-31 days after trauma and 18-45 weeks later. Methods and procedures: GCS, CT-analysis, comprehensive neuropsychological assessment. Main results: The initial GCS-score was significantly correlated with outcome impairments of semantic fluency and memory in the Wechsler Similarities and in two clinical scales (Neurobehavioural Rating Scale, Frontal Lobe Score). The presence of CT-signs of DAI corresponded with deficits in tasks of response selection and suppression, the presence of focal contusions with results in the clinical scales, reaching significance for behavioural deficits with frontal contusions. Improvements between first and second assessments were pronounced in patients with signs of DAI. Conclusions: The data indicate that traumatic DAI results in mainly transient neuropsychological deficits. Focal frontal contusions result in more relevant deficits at outcome that affect behaviour and, thus, impair rehabilitation prognosis. It is concluded that even in clinically 'mild' TBI, prognosis and rehabilitation requirements should be established by early imaging and post-acute neuropsychological assessment.     

Neuropsychological functioning during the year following severe traumatic brain injury

The neuropsychological functioning of a group of 65 adults with severe traumatic brain injury was assessed at 6 months and 1 year post-injury. The cognitive domains assessed were pre-morbid intellectual level, current level of general intellectual functioning, simple and complex attention, verbal memory, executive functioning, and perceptual functioning. At least 40%, and up to 74%, of the TBI patients displayed some degree of impairment on tests administered at 6 months. Improvement was found to occur in all areas of cognitive functioning over the first year following injury. Despite this improvement at least 31%, and up to 63%, of TBI patients displayed some degree of impairment on tests administered at 1 year post-injury. The various types of neuropsychological functioning were affected to different degrees, indicating that different aspects of cognition are more susceptible to injury, and that recovery takes place at a differential rate across functions. The implications of these findings for the appropriate planning and allocation of treatment and rehabilitation resources, and the development of effective rehabilitation interventions are outlined.     

Magnetic resonance imaging and computerized tomography in relation to the neurobehavioral sequelae of mild and moderate head injuries

Twenty patients admitted for minor or moderate closed-head injury were studied to investigate the relationship between magnetic resonance imaging (MRI) and neurobehavioral sequelae. The MRI scans demonstrated 44 more intracranial lesions than did concurrent computerized tomography (CT) scans in 17 patients (85%); most of these lesions were located in the frontal and temporal regions. Estimates of lesion volume based on MRI were frequently greater than with CT; however, MRI disclosed no additional lesions that required surgical evacuation. Neuropsychological assessment during the initial hospitalization revealed deficits in frontal lobe functioning and memory that were related to the size and localization of the lesions as defined by MRI. Follow-up MRI and neuropsychological testing at 1 month (13 cases) and 3 months (six cases) disclosed marked reduction of lesion size paralleled by improvement in cognition and memory. These findings encourage further investigation of the prognostic utility of MRI for the clinical management and rehabilitation of mild or moderate head injury.     

Neuropsychological assessment and the Disability Rating Scale (DRS): a concurrent validity study

Assessment of current level of functioning among clients with traumatic brain injury (TBI) often guides the establishment of realistic outcome goals for post-acute rehabilitation. Further, data generated from neuropsychological testing provide a clinician with a better understanding of a client's pattern of cognitive strengths and weaknesses. The Disability Rating Scale (DRS) is commonly used by TBI rehabilitation facilities to assess a client's general level of functioning in terms of impairment, disability, and handicap. Previous studies have used clients' neuropsychological test results to predict future level of functioning. These studies have shown mixed results regarding the predictive validity of the test findings; however, they usually employ only a limited number of tests for prediction representing a limited number of cognitive domains. Using a concurrent validity design, the present study investigated the bivariate associations between various neuropsychological testing domains (i.e. intellectual, academic, language, visuoperceptual, memory, and executive functioning) and level of functioning as indexed by the DRS. Participants were administered the DRS and the neuropsychological evaluation during the initial part of post-acute rehabilitation. Composite scores were derived for each of the neuropsychological domains. Most participants were categorized as sustaining a severe TBI. The mean age and education of this predominately male sample was 28.84 years (SD = 9.13) and 11.83 years (SD = 1.7), respectively. Results revealed a significant positive relationship between performances in intellectual, executive, academic, and visuoperceptual domains and level of functioning.     

Cognitive orientation in rehabilitation and neuropsychological outcome after traumatic brain injury

This study evaluated the ability of the Orientation Log (O-Log) to predict cognitive outcome at rehabilitation discharge, as well as future neuropsychological outcome. The hypothesis was that patients who demonstrated better orientation upon admission would achieve superior functional cognitive outcome at discharge and on subsequent neuropsychological assessment. Sixty individuals receiving inpatient rehabilitation following a new-onset TBI participated. Orientation data was collected using the O-Log during morning bedside rounds. Outcome data was collected at 6 and 12 months post-injury. Significant correlations were found between the O-log and measures of memory, executive functioning, basic verbal skills, and estimated intellectual ability. When compared to the other predictor variables, step-wise multiple regression analyses revealed that the minimum O-Log score was the primary significant predictor of performance on six neuropsychological and functional outcome measures. Results of this study suggest that evaluating orientation with the O-Log during acute rehabilitation may reflect level of injury severity and aid in predicting cognitive outcome.     

The neuropsychology of blunt head injury in the early postacute stage: effects of focal lesions and diffuse axonal injury

This investigation evaluated the neuropsychological symptoms in the early posttraumatic period following blunt head injury and their correlation to routine imaging data in a consecutive series of TBI patients (Magdeburg Neurotrauma Databank). Of 135 consecutive patients, 68 could be assessed neuropsychologically 8-21 days after trauma. In 61 patients, routine clinical CT data were sufficient for neuroradiological analysis focusing on the presence or absence of CT signs of diffuse axonal injury (DAI) or focal traumatic injury. In these patients, the initial GCS score was significantly correlated with the presence of DAI but not with focal pathology. The presence of DAI was correlated with behavioral and cognitive symptoms of frontal lobe dysfunction, especially in interference tasks (Go/NoGO and Stroop reaction times) and semantic fluency. The presence of local frontal or temporal traumatic lesions was associated with deficits in concept formation, fluency tasks and behavioral symptoms, but not with increased interference. Patients with frontal contusions were impaired in a task of visuomotor planning and performance (Block design). Our data indicate that both traumatic DAI and focal lesions result in frontal lobe symptoms. We conclude that, even in clinically "mild" TBI, brain imaging should be used to identify patients with substantial brain damage. These should be assessed neuropsychologically for possible posttraumatic cognitive or behavioral impairment. In consideration of its easy accessibility, the refined use of the CT is considered a promising and valid tool for patient stratification. The application of MRI and biochemical markers may further improve prognostic predictions.     

Performance on measures of executive function following pediatric traumatic brain injury

Objective : To investigate the relationships among age at injury, neuroanatomic lesion location, and measures of executive function (EF) following paediatric traumatic brain injury (TBI).

Methods : EF was assessed in 68 children (aged 7-15) with moderate-to-severe TBI 1 year post-injury. EF tests included: (1) Tower of Hanoi (TOH), a measure of problem solving ability, (2) Wisconsin Card Sorting Test (WCST), a measure of categorization and ability to shift cognitive strategies, (3) Letter Fluency (LF), a measure of novel lexical search and rule-governed word generation. EF variables included number of moves needed to achieve a 3-ring solution on the TOH, number of perseverative and non-perseverative errors on the WCST, and number of words generated on LF. Intellectual functioning was also assessed using the Verbal Intellectual Quotient (VIQ) from the Wechsler Intelligence Scale from Children-3rd edn (WISC-III). Data from standardized MRIs, performed at 3-months post-injury, were available for all subjects and were used to determine lesion location, lesion volumes, and total number of lesions. The relationships among EF, lesion variables (frontal lesion volume, extrafrontal lesion volume, total number of lesions) and age at injury were examined. Pre-injury special education services and attention deficit hyperactivity disorder (ADHD) were controlled for.

Results : Younger age at injury was associated with more perseverative errors on the WCST and worse performance on LF. Frontal lesion volume was not predictive of performance on any measures of EF. Greater extrafrontal lesion volume and total number of lesions were predictive of worse performance on LF. When controlling for pre-injury special education placement and pre-injury ADHD, there was little change in the results.

Conclusions : Younger age at injury places children at greater risk of impairment on measures of EF. Performance on measures of EF depends on brain variables other than frontal lobes including extrafrontal cortical brain areas and total number of lesions. The relationship between extrafrontal brain regions and EF suggests that domain-specific cognitive content (i.e. language or visuospatial analysis), mediated by the parietal or temporal lobes, may disrupt underlying cognitive processes necessary for successful performance on measures of EF. In addition, the association between total number of lesions and EF may be related to disconnections and disruption of frontal/subcortical systems.     

Do lesion site and severity predict deficits in attentional control after preschool traumatic brain injury (TBI)?

PRIMARY OBJECTIVE: To determine the predictive value of structural neuroimaging in the clinical setting following TBI. Research design: Prospective between-group design, comparing groups with regard to: (i) the presence or absence of cerebral pathology and (ii) the location of cerebral pathology. The predictive value of injury variables was investigated using hierarchical regressions. METHODS AND PROCEDURES: Thirty-six children, between 6 and 14 years, who sustained a moderate to severe TBI 5 years previously participated in this study. Children's performances on five measures of attentional control were examined in relation to the presence, location and severity of their lesions, as coded by the Coffey classification system 1. MAIN OUTCOMES AND RESULTS: Frontal lesion severity was not predictive of performance on any of the measures. However, generalized (frontal and extrafrontal) and extrafrontal lesion severity was predictive of poor performance. CONCLUSIONS: These findings support the argument that functional organization in children may differ from that in adults, suggesting that multiple cerebral regions, or a diffuse cerebral network, may mediate children's executive functions (EF). Results are also consistent with the hypothesis that the amount of damaged brain tissue, rather than its location, may be more predictive of neurobehavioural outcome following early TBI.     

Participation as an outcome of traumatic brain injury rehabilitation

OBJECTIVES: Participation in meaningful life situations is an important aspect of functioning after traumatic brain injury (TBI). However, to date, few studies have included measures of social participation or community integration as outcome measures after TBI rehabilitation. This paper is a selective review of the literature that examines the effects of TBI rehabilitation on measures of participation or community integration. It also addresses the related questions of clinically significant improvements in community integration, variability in patterns of community functioning, and the relationship of participation and quality of life after TBI. DESIGN: Literature review. CONCLUSIONS: A small number of studies suggest that postacute TBI rehabilitation can produce improvements in participation and community integration. However, a considerable amount of variability in rehabilitation outcomes may be apparent. Analysis of clinically significant changes in individual's functioning suggests that rehabilitation may exert its benefits not only by facilitating improvements, but also by preventing declines in community functioning. Subjective well-being and quality of life have generally been ignored as TBI rehabilitation outcomes. There is considerable evidence that participation and subjective well-being represent distinct and dissociable outcomes after TBI, which may reflect the importance of patients' preferences and values in evaluating the effectiveness of rehabilitation.     

The Frontal Systems Behaviour Scale (FrSBe) as a predictor of community integration following a traumatic brain injury

PRIMARY OBJECTIVE: This study examined the relationships between the Frontal Systems Behaviour Scale (FrSBe), neuropsychological tests and community integration outcomes among individuals with a history of TBI. METHODS: Seventy-six individuals with a history of TBI were consecutively recruited from patients seen in a Neuropsychology clinic in an academic healthcare setting. Participants completed neuropsychological tests, the FrSBe and the Community Integration Questionnaire (CIQ) as part of a standard clinical neuropsychological evaluation. RESULTS: The FrSBe was a significant predictor of community integration (CIQ) outcomes. Specifically, poorer executive functioning (FrSBe Executive Functioning) predicted lower CIQ Total Scores, while increased apathy (FrSBe Apathy) was associated with reduced CIQ Productivity. Regarding neuropsychological tests, only Delayed Memory remained as a predictor: higher scores were associated with enhanced CIQ Total Scores and CIQ Social Integration. Finally, female gender was associated with superior CIQ Total Scores, CIQ Home Integration and CIQ Productivity. CONCLUSIONS: While neuropsychological tests of executive functioning failed to add predictive power to models of community integration following TBI with this sample, the FrSBe, a measure of behavioural manifestations of frontal lobe dysfunction, did predict these important functional outcomes. This suggests that use of the FrSBe may enhance the ecological validity of information gathered during a clinical neuropsychological assessment.     

The Frontal Systems Behaviour Scale (FrSBe) as a predictor of community integration following a traumatic brain injury

Primary objective: This study examined the relationships between the Frontal Systems Behaviour Scale (FrSBe), neuropsychological tests and community integration outcomes among individuals with a history of TBI.

Methods: Seventy-six individuals with a history of TBI were consecutively recruited from patients seen in a Neuropsychology clinic in an academic healthcare setting. Participants completed neuropsychological tests, the FrSBe and the Community Integration Questionnaire (CIQ) as part of a standard clinical neuropsychological evaluation.

Results: The FrSBe was a significant predictor of community integration (CIQ) outcomes. Specifically, poorer executive functioning (FrSBe Executive Functioning) predicted lower CIQ Total Scores, while increased apathy (FrSBe Apathy) was associated with reduced CIQ Productivity. Regarding neuropsychological tests, only Delayed Memory remained as a predictor: higher scores were associated with enhanced CIQ Total Scores and CIQ Social Integration. Finally, female gender was associated with superior CIQ Total Scores, CIQ Home Integration and CIQ Productivity.

Conclusions: While neuropsychological tests of executive functioning failed to add predictive power to models of community integration following TBI with this sample, the FrSBe, a measure of behavioural manifestations of frontal lobe dysfunction, did predict these important functional outcomes. This suggests that use of the FrSBe may enhance the ecological validity of information gathered during a clinical neuropsychological assessment.     

Long-term neuropsychological performance in a cohort of children and adolescents after severe paediatric traumatic brain injury

Objective: The purpose of the present study was to evaluate progress in neuropsychological performance in children and adolescents with severe paediatric traumatic brain injury (TBI), from admission to the rehabilitation centre up to 3-12 years after the trauma.

Methods: Children and adolescents (n = 31, mean age at injury 11.8 years, SD = 3.8; at follow-up 18.8 years; SD = 4.5) who all had suffered a TBI participated. A comprehensive neuropsychological test battery was administered at the start of rehabilitation (T1), around discharge (T2) and in the long-term (at least 3 years after rehabilitation; T3). T1 and T2 were clinical assessments; T3 was executed as a follow-up measurement for this study.

Results: At T1 and T2, most problems were in the domains of attention, memory and executive functioning. At the start of rehabilitation most deficits were with performal intelligence (61%); at discharge (mean length of stay 411 days) considerably less children had severe deficits on the intelligence domain (23%). At long-term follow-up, most problems were in the domains attention, mental speed and memory. From admission to discharge 42% of the children improved on two or more cognitive tests; from discharge to follow-up this percentage was 13%.

Conclusions: In this unique study a clinical cohort of children with severe TBI was followed for many years after injury. Most cognitive deficits were found in the early phase of rehabilitation. Most children did improve on cognitive functioning (40%) during the first year after their injury, whereas at follow-up most children had not changed. At follow-up, more than half of the children (54%) attended a regular school or had a regular job, corresponding to their age and pre-morbid functioning.     

Phonemic and semantic fluencies in traumatic brain injury patients with focal frontal lesions

The purpose of this study was to investigate the effect of focal frontal lesions, identified by magnetic resonance imaging (MRI), in a group of traumatic brain injured (TBI) patients, in order to clarify the sensitivity of phonemic and semantic fluency tasks as tests of frontal lobe functioning. Thirteen TBI patients were included and matched with a normal control group of 26 subjects. Frontal lobe patients produced significantly fewer words than the control group in the phonemic fluency condition. Semantic performance correlated with lesion size, but phonemic performance did not, corroborating the idea that the two have different brain-based substrates. Although, as a group effect, frontal lesions impaired fluency, not all patients were impaired, even in the presence of large bilateral frontal lesions.     

Influence of lesions detected by computed tomography on outcome and neuropsychological recovery after severe head injury

Outcome at 6 months after severe head injury was determined in 117 patients whose computed tomographic (CT) examinations demonstrated diffuse axonal injury (DAI), diffuse swelling (DS), or focal injuries. Neuropsychological sequelae were ascertained from two examinations in 30 of the conscious survivors within the 1st year after injury. Outcome differences varied with the type of CT lesion. DS and focal injuries resulted in more favorable (good recovery) outcomes. Mortality was higher after DAI. Neuropsychological outcome varied with the type of CT lesion and the function measured. Overall differences in memory and learning were revealed among the three CT lesion categories, whereas differences in intelligence and visuomotor functions were not significant. Levels of memory, learning, and visuomotor speed were higher after DS injuries, but improvement was less. Greater improvement of memory, learning, and visuomotor speed occurred after DAI. After focal injuries, visuomotor speed improved, but not recall and learning. The results suggest that the type of injury incurred differentially influences the outcome and the neuropsychological aftermath of severely head-injured adults.     

Psychosocial and emotional outcomes 10 years following traumatic brain injury

OBJECTIVES: To investigate the association of psychosocial outcome 10 years following traumatic brain injury (TBI) with demographic variables, injury severity, current cognitive functioning, emotional state, aggression, alcohol use, and fatigue. SETTING: Community-based follow-up. PARTICIPANTS: Fifty-three participants with mild to very severe TBI sustained 10 years previously and significant others. MEASURES: Sydney Psychosocial Reintegration Scale, Extended Glasgow Outcome Scale, Hospital Anxiety and Depression Scale, NFI Aggression scale, Fatigue Severity Scale, Alcohol Use Disorders Identification Test, neuropsychological tests of attention/processing speed, memory, and executive function. RESULTS: Psychosocial functioning was lowest in the occupational activity domain and highest in the living skills domains. Variables including education, posttraumatic amnesia duration, numerous cognitive measures, concurrent fatigue, aggression, anxiety, and depression were all significantly associated with psychosocial outcome, although the strength of correlations varied between ratings of participants with TBI and relatives. Posttraumatic amnesia duration was most strongly associated with psychosocial outcome measured by relatives; anxiety, aggression, and depression were the strongest predictors when ratings were assigned by participants with TBI. Self-reported fatigue, depression, and alcohol use were the strongest predictors of aggression. CONCLUSIONS: It is important to address problems with anxiety, depression, fatigue, and alcohol use as a possible means of improving long-term psychosocial outcome following TBI.     

Cognitive Rehabilitation in Traumatic Brain Injury

Traumatic brain injury (TBI) is a major public health problem with neurobehavioral sequelae contributing to the long-term disability that is often associated with the moderate to severe levels of injury. Rehabilitation of cognitive skills is central to encouraging the full participation of the individual in home, vocational, and social roles. The review of available evidence points to four major recommendations for the rehabilitation of cognition following brain injury: 1) Access to subacute rehabilitation that is holistic in nature and involves a multidisciplinary or transdisciplinary team to work in an integrated fashion to support physical, cognitive, and social skill retraining is vital to support positive outcome following TBI. The collaborative effort of these individuals allows for continual reinforcement and evaluation of treatment goals and will often involve the family and/or important others in the individual’s life to prepare for community re-entry. 2) Trials of medication, especially methylphenidate, to assist individuals with significant attention and memory impairment appear well supported by the available evidence. Though some data suggest that the use of cholinesterase inhibitors may be of use for individuals with memory impairments, there is less support for this practice and there are indications that it may worsen the behavioral sequelae of the injury. 3) Randomized controlled trials demonstrate the utility of specific rehabilitation approaches to attention retraining and retraining of executive functioning skills. Future research is needed on rehabilitation techniques in other domains of cognition. 4) Training in the use of supportive devices (either a memory book or more technologically enhanced compensatory devices) to support the individual’s daily activities remains central to the independent function of the individual in the community. Though emerging treatments (eg, virtual reality environments) show relative degrees of promise for inclusion in the rehabilitation of the individual with TBI, these need further evaluation in systematic trials.     

Rehabilitation outcomes in elderly patients with traumatic brain injury in Singapore

OBJECTIVE: To identify and characterize injury variables and outcomes in persons with traumatic brain injury (TBI) 55 years and older admitted to a tertiary rehabilitation unit. DESIGN: Retrospective study of 52 individuals with TBI covering a 4-year period. OUTCOME MEASURES: Admission and discharge Modified Barthel Index scores; total acute and rehabilitation length of stay; Glasgow Coma Scale (GCS); duration of posttraumatic amnesia (PTA); Glasgow Outcome Scale at discharge and at 6 months postinjury; Ranchos Los Amigos Scale; and discharge disposition. RESULTS: Most common mechanism of injury was falls (61.5%), and predominant computed tomographic scan finding was lobar contusion (44%). Thirty-one percent had GCS score less than 9, but 90% had PTA duration of more than 1 week. Mean length of stay in acute and rehabilitation facilities was 26.4 (SD = 15.9) days and 29.8 (SD = 14.4) days, respectively. Difference between admission and discharge Modified Barthel Index was significant (P < .001), and 90% were discharged home. There was improvement in Glasgow Outcome Scale score at 6 months. CONCLUSIONS: Most patients in this cohort had severe brain injury, which may be due to a higher incidence of intracerebral hematoma. The GCS score underestimates the severity of brain injury in elderly persons with TBI; PTA duration was more representative of severity. Older patients with TBI do benefit from rehabilitation with significant functional gains and a high rate of return to home and to community.