Journal of neurotrauma
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Journal of neurotrauma · Mar 2021
Meta AnalysisThe Efficacy and Harms of Pharmacological Interventions for Anxiety after Traumatic Brain Injury - Systematic Review.
After a traumatic brain injury (TBI), many persons experience significant and debilitating problems with anxiety. The aim of this systematic review was to critically evaluate the evidence regarding efficacy of pharmacological interventions for anxiety after TBI. We reviewed studies published in English before July 2020 and included original research on pharmacological interventions for anxiety after TBI in adults ≥16 years of age. ⋯ The methodological quality of the study was difficult to assess because of the lack of detail. No recommendations could be drawn from this review. There is a critical need for adequately powered and controlled studies of pharmacological interventions for anxiety after TBI across all severities that examine side-effect profiles and consider issues of comorbidity and effects of long-term pharmacotherapy.
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Journal of neurotrauma · Mar 2021
Developing an Index of Medical Conditions Associated with Outcomes After Moderate to Severe Traumatic Brain Injury.
Medical conditions co-occurring with traumatic brain injury (TBI) are associated with outcomes, and comorbidity indices such as Charlson and Elixhauser are used in TBI research, but they are not TBI specific. The purpose of this research was to develop an index or indices of medical conditions, identified in acute care after moderate to severe TBI, that are associated with outcomes at rehabilitation discharge. Using the TBI Model Systems National Database, the International Classification of Diseases, Ninth Revision (ICD-9) and Tenth Revision (ICD-10) codes of 8988 participants were converted to Healthcare Cost and Utilization Project (HCUP) diagnostic categories. ⋯ Unweighted, weighted, and anchored indices based on the outcome models predicted 7.5-14.3% of the variance in the observed outcomes. When the indices were applied to a new validation sample of 1613 cases, however, only 2.6-6.6% of the observed outcomes were predicted. Therefore, no models or indices were recommended for future use, but several study findings are highlighted suggesting the importance and the potential for future research in this area.
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Journal of neurotrauma · Mar 2021
Impaired Self-Awareness after Pediatric Traumatic Brain Injury: Protective Factor or Liability?
Children and adolescents with traumatic brain injury (TBI) can experience impaired self-awareness, or difficulty in accurately perceiving their personal abilities. This study aimed to identify the neuro-developmental and socio-environmental factors associated with self-awareness impairment and determine how self-awareness is associated with psychosocial functioning. Parents and their children age 8-16 years with TBI (n = 107, 65.4% male, mean [M] age = 12.66 years, standard deviation [SD] = 2.6 years) were consecutively recruited from an outpatient clinic over a 4-year period. ⋯ Poorer self-awareness was associated with worse parent-rated child adaptive functioning and emotional and behavioral problems. However, poorer self-awareness was also significantly associated with more positive self-concept and fewer symptoms of depression and anxiety as rated by children. Overall, impaired self-awareness seems to be both a liability and a benefit depending on the reporter (parent or child) and outcome of interest (adaptive function/behavior or self-concept/mood).
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Journal of neurotrauma · Mar 2021
Assessment of the effects of altered amyloid-beta clearance on behavior following repeat closed-head brain injury in APP humanized mice.
Traumatic brain injury (TBI) increases the risk for dementias including Alzheimer's disease (AD) and chronic traumatic encephalopathy. Further, both human and animal model data indicate that amyloid-beta (Aβ) peptide accumulation and its production machinery are upregulated by TBI. Considering the clear link between chronic Aβ elevation and AD as well as tau pathology, the role(s) of Aβ in TBI is of high importance. ⋯ Our results show that the presence of the human form of Aβ did not exacerbate motor (Rotarod) and spatial learning/memory deficits (Morris water maze) post-injuries, while potentially reduced anxiety (Open Field) was observed. NEP and NEP2 deficiency also did not exacerbate these deficits post-injuries and was associated with protection from motor (NEP and NEP2) and spatial learning/memory deficits (NEP only). These data suggest that normally regulated expression of wild-type human APP/Aβ does not contribute to deficits acutely after TBI and may be protective at this stage of injury.
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Journal of neurotrauma · Mar 2021
Diffusion tensor imaging in contact and non-contact university-level sport athletes.
Subconcussive hits to the head and physical fitness both have been associated with alterations in white matter (WM) microstructure in partly overlapping areas of the brain. The aim of the present study was to determine whether WM damage associated with repeated exposure to subconcussive hits to the head in university level contact sports athletes is modulated by high levels of fitness. To this end, 72 students were recruited: 24 athletes practicing a varsity contact sport (A-CS), 24 athletes practicing a varsity non-contact sport (A-NCS), and 24 healthy non-athletes (NA). ⋯ The A-NCS also showed higher FA compared with NA in the anterior regions of the corpus callosum and the corticospinal tracts. No group difference was found between the A-CS and the NA groups. These data suggest that repeated subconcussive hits to the head lead to anisotropic changes in the WM that may counteract the beneficial effects associated with high levels of fitness.