Journal of neurotrauma
-
Journal of neurotrauma · Dec 2015
Multicenter StudyMortality following Traumatic Brain Injury among Individuals Unable to Follow Commands at the Time of Rehabilitation Admission: A NIDRR TBI Model Systems Study.
Severe traumatic brain injury (TBI) has been associated with increased mortality. This study characterizes long-term mortality, life expectancy, causes of death, and risk factors for death among patients admitted within the National Institute on Disability and Rehabilitation Research (NIDRR) TBI Model Systems Programs (TBIMS) who lack command following at the time of admission for inpatient TBI rehabilitation. Of the 8084 persons enrolled from 1988 and 2009, 387 from 20 centers met study criteria. ⋯ The subset of individuals with TBI who are unable to follow commands upon admission to inpatient rehabilitation are at a significantly increased risk of death when compared with the U. S. general population and compared with all individuals with moderate to severe TBI receiving inpatient rehabilitation. Respiratory causes of death predominate, compared with the general population.
-
Journal of neurotrauma · Dec 2015
ReviewChronic Histopathological and Behavioral Outcomes of Experimental Traumatic Brain Injury in Adult Male Animals.
The purpose of this review is to survey the use of experimental animal models for studying the chronic histopathological and behavioral consequences of traumatic brain injury (TBI). The strategies employed to study the long-term consequences of TBI are described, along with a summary of the evidence available to date from common experimental TBI models: fluid percussion injury; controlled cortical impact; blast TBI; and closed-head injury. For each model, evidence is organized according to outcome. ⋯ The majority of experimental TBI studies collect data in the acute postinjury period, but few continue into the chronic period. Available evidence from long-term studies suggests that many of the experimental TBI models can lead to progressive changes in histopathology and behavior. The studies described in this review contribute to our understanding of chronic TBI pathology.
-
Journal of neurotrauma · Dec 2015
ReviewChronic Aspects of Pediatric Traumatic Brain Injury, Review of the Literature.
Traumatic brain injury (TBI) in children, while the brain is in a state of rapid change and development, can adversely impact their development, their extended environment, and their families. The extant literature has identified several physiological, genetic, and environmental variables that predict outcomes after pediatric TBI; nonetheless, the individual course of recovery and later development of a given child is uniquely shaped by injury-related factors (e.g., nature and extent of the injury itself, the developmental status of the child) as well as a number of personal and family variables (e.g., pre-injury cognitive, genetic, and psychological status of the child, family functioning and resources, coping style). ⋯ Instead, observing trajectories of development over time may allow for a better understanding of the long-term consequences in many functional domains that interest researchers, clinicians, and families. The current article reviews the chronic aspects of medical/health, cognitive/academic, emotional/behavioral, and family/social outcomes after pediatric TBI, with the goal of providing monitoring and treatment strategies for affected children and their families, as well as serving as a resource for researchers designing studies to better understand this heterogeneous population.
-
Journal of neurotrauma · Nov 2015
Age at First Exposure to Football is Associated with Altered Corpus Callosum White Matter Microstructure in Former Professional Football Players.
Youth football players may incur hundreds of repetitive head impacts (RHI) in one season. Our recent research suggests that exposure to RHI during a critical neurodevelopmental period prior to age 12 may lead to greater later-life mood, behavioral, and cognitive impairments. Here, we examine the relationship between age of first exposure (AFE) to RHI through tackle football and later-life corpus callosum (CC) microstructure using magnetic resonance diffusion tensor imaging (DTI). ⋯ Results showed that former NFL players in the AFE <12 group had significantly lower FA in anterior three CC regions and higher radial diffusivity in the most anterior CC region than those in the AFE ≥12 group. This is the first study to find a relationship between AFE to RHI and later-life CC microstructure. These results suggest that incurring RHI during critical periods of CC development may disrupt neurodevelopmental processes, including myelination, resulting in altered CC microstructure.