This fall, tens of millions of people will be at risk for chronic traumatic encephalopathy (CTE), a degenerative brain disease caused by repeated head impacts from contact sports like football, soccer, and ice hockey, or military service. Researchers have long suspected that the brain begins changing years before CTE appears, but proof has been elusive because CTE can only be definitively diagnosed after death.
Study of young athletes finds neurodegeneration might begin before chronic traumatic encephalopathy
