Abstract:Symptomatic concussed athletes (tested within ~7 d of injury) exhibit an attenuated rise in blood pressure and heart rate during the cold pressor test (CPT), which is indicative of sympathetic hyporeactivity. However, resting blood pressure is elevated following a sports season that has a high incidence of repetitive subconcussive head impacts (SHI) which suggests autonomic or vascular dysfunction. A single session of experimentally induced repetitive SHI increases circulating biomarkers of neuronal injury. In… Show more
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