Journal of neurotrauma
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Journal of neurotrauma · Feb 2021
Association of Head Impact Exposure with White Matter Macro- and Microstructure Metrics.
Prior studies have reported white matter abnormalities associated with a history of cumulative concussion and/or repetitive head impacts (RHI) in contact sport athletes. Growing evidence suggests these abnormalities may begin as more subtle changes earlier in life in active younger athletes. We investigated the relationship between prior concussion and contact sport exposure with multi-modal white matter microstructure and macrostructure using magnetic resonance imaging. ⋯ Concussion history was not significantly associated with QSM, DTI, DKI, or white matter volume (all, p 0.05). Cumulative contact sport exposure is associated with subtle differences in white matter microstructure, but not gross white matter macrostructure, in young active athletes. Longitudinal follow-up is required to assess the progression of these findings to determine their contribution to potential adverse effects later in life.
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Journal of neurotrauma · Feb 2021
Single mild traumatic brain injury deteriorates progressive inter-hemispheric functional and structural connectivity.
The present study examined dynamic interhemispheric structural and functional connectivity in mild traumatic brain injury (mTBI) patients with longitudinal observations from early subacute to chronic stages within 1 year of injury. Forty-two mTBI patients and 42 matched healthy controls underwent clinical and neuropsychological evaluations, diffusion tensor imaging, and resting-state functional magnetic resonance imaging. All mTBI patients were initially evaluated within 14 d post-injury (T-1) and at 3 months (T-2) and 6-12 months (T-3) follow-ups. ⋯ Moreover, loss of interhemispheric structural connectivity through the CC corresponded well to regions presenting altered interhemispheric functional connectivity. Decreased functional connectivity in the dorsolateral prefrontal cortex thereafter contributed to poor executive function in mTBI patients. The current study provides further evidence that the CC is a sign to interhemispheric highways underpinning the widespread cerebral pathology typifying mTBI syndrome.
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Journal of neurotrauma · Feb 2021
Provider Perspectives on Early Psychosocial Interventions after Pediatric Severe Traumatic Brain Injury: an Implementation Framework.
This study created a framework incorporating provider perspectives of best practices for early psychosocial intervention to improve caregiver experiences and outcomes after severe pediatric traumatic brain injury (TBI). A purposive sample of 23 healthcare providers from the emergency, intensive care, and acute care departments, was selected based on known clinical care of children with severe TBI at a level 1 trauma center and affiliated children's hospital. Semistructured interviews and directed content analysis were used to assess team and caregiver communication processes and topics, prognostication, and recommended interventions. ⋯ Specific family-centered and trauma-informed interventions included: (1) creating and sharing interdisciplinary plans with caregivers, (2) coordinating prognostication meetings and communications, (3) tracking family education, (4) improving institutional coordination and workflow, (5) training caregivers to support family involvement, (6) performing biopsychosocial assessment, and (7) using systematic prompts for difficult conversations and to address family needs at regular intervals. Healthcare workers from a variety of disciplines want to incorporate certain trauma-informed and family-centered practices at each stage of treatment to improve experiences for caregivers and outcomes for pediatric patients with severe TBI. Future research should test the feasibility and effectiveness of incorporating routine psychosocial interventions for these patients.
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Journal of neurotrauma · Feb 2021
Recovery Profiles Following Concussion Among Male Student-Athletes and Service Cadets with a Family History of Neurodegenerative Disease: Data from the NCAA-DOD CARE Consortium.
Preliminary evidence indicates that genetic factors associated with having a family history of neurodegenerative disease (fhNDD) may predispose an individual to persistent symptoms and poorer cognitive performance after concussion. No previous study, however, longitudinally examined athletes with (+) and without (-) a fhNDD. Therefore, we aimed to compare clinical symptoms and cognitive performance of fhNDD+ and fhNDD- athletes at baseline and at multiple time points after concussion. ⋯ Compared with fhNDD- athletes, fhNDD+ individuals demonstrated greater decrements in impulse control, 24-48 h post-injury, at the return to play, and at six-month assessments (p < 0.01, d = 0.23). These findings suggest that male athletes with a fhNDD may exhibit greater decrements in cognitive performance after concussion. Small, subtle deficits in cognitive performance may still significantly hinder day-to-day function in student-athletes.
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Journal of neurotrauma · Feb 2021
Quantification of capillary perfusion in an animal model of acute intracranial hypertension.
Intracranial hypertension (IH) is a common feature of many pathologies, including brain edema. In the brain, the extended network of capillaries ensures blood flow to meet local metabolic demands. Capillary circulation may be severely affected by IH, but no studies have quantified the effect of intracranial pressure (ICP) and cerebral perfusion pressure (CPP) on capillary perfusion during the development of brain edema. ⋯ In the ICP range of 7-42 mm Hg, relative changes in FPV were significantly correlated with ICP, BP, and CPP (p < 0.001), with ICP and CPP being the best predictors. In conclusion, elevated ICP induces a gradual collapse of the cerebral microvasculature, which is initiated before the clinical threshold of IH. In summary, the estimate of capillary perfusion might be essential in patients with IH to assess the state of the brain microcirculation and to improve the availability of oxygen and nutrients to the brain.