The Summary Brett Favre revealed on Tuesday that he has Parkinson's disease. Hall of Fame quarterback Brett Favre’s announcement that he has Parkinson’s disease is bringing renewed attention to the potential links between collision sports and a risk of brain disease. It definitely says something.”Neurologists who treated boxing legend Muhammad Ali concluded in 2022 that his medical history supported a diagnosis of young-onset Parkinson’s disease, but they could not link the disease to head trauma. Many former football players have been found to show signs of the brain disease, which can only be diagnosed post-mortem. Crutchfield said it’s important for players to take breaks after a head trauma to avoid more serious brain injuries.

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