There is emerging evidence that cumulative sports-related concussions may lead to long-term neurological abnormalities. The extent to which changes are occurring in collegiate athletes is still undetermined, and the progression of these changes is poorly understood. Cross sectional studies with small cohorts have found that concussions maybe be associated with cortical thinning in young football players (1,2). We analyze the longitudinal changes occurring in high vs. low contact sports over the course of 3-4 years.
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