Quarterback Brett Favre recently opened up about some memory lapses, which be a sign of chronic traumatic encephalopathy. Find out more about this disease and some of the professional athletes who have suffered from it.
In 2007, WWE wrestler Chris Benoit had his brain examined after he killed his wife and son before committing suicide. Originally the tragedy was thought to be due to the abuse of anabolic steroids. However, a brain biopsy identified pathognomonic brain tissue changes of CTE.