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Contact: Eric Schoch
Indiana University

Thomas W. McAllister, M.D., Indiana University School of Medicine

Caption: Repeated blows to the head during a season of contact sports may cause changes in the brain's white matter and affect cognitive abilities even if none of the impacts resulted in a concussion, according to a study published in the journal Neurology.

Credit: Indiana University

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Related news release: Study links nonconcussion head impacts in contact sports to brain changes and lower test scores

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