Brett Favre, the Hall of Fame quarterback, has disclosed that he has been diagnosed with Parkinson's disease, joining a list of notable sports figures affected by the condition. Parkinson's is a progressive nervous system disorder that impacts movement and has no known cure. Favre's diagnosis raises awareness about the potential links between head injuries in sports and the development of Parkinson's, as multiple concussions have been associated with an increased risk of the disease. The article discusses the broader implications of Parkinson's disease in sports and the ongoing research into its causes and treatments.

• Brett Favre's diagnosis highlights the potential link between sports-related head injuries and Parkinson's disease.
• Parkinson's affects over a million people in the U.S., with 90,000 new diagnoses expected this year.
• There is no known cure for Parkinson's, but treatments exist to manage symptoms.