The dangers of concussion in martial arts
The recent death - viewed as a probable suicide - by former wrestler and mixed martial arts fighter Sean O'Haire might definitely be a stark reminder of the potential dangers involved in contact sports where head injuries may be prevalent on a more regular basis.
Here's from sports.yahoo.com:
This issue first came to light in the aftermath of the infamous scandal of Chris Benoit's horrific double murder-suicide. At the request of Christopher Nowinski, Mike Benoit allowed an autopsy to be conducted on his son's brain by the Sports Legacy Institute. The results were shocking. They found that his brain displayed large amounts of abnormal Tau proteins and concluded that he had been suffering from chronic traumatic encephalopathy (CTE), a degenerative disease that can lead to symptoms also found in dementia, like memory loss, aggression, confusion and depression.