What is CTE?
Chronic Traumatic Encephalopathy(CTE) is a progressive degenerative disease of the brain found in people with a history of repetitive brain trauma, including symptomatic concussions as well as subconcussive hits to the head that do not cause symptoms. CTE has been known to affect boxers since the 1920’s (when it was termed punch drunk syndrome or dementia pugilistica). However, in recent years the disease has been found in other athletes, including football and hockey players, as well as in
military veterans. CTE is not limited to professional athletes; it has also been found in a
thletes who did not play sports after high school or college. The repeated brain trauma triggers progressive degeneration of the brain tissue, including the build-up of an abnormal protein called tau. The brain degeneration is associated with common symptoms of CTE including memory loss, confusion,
impaired judgment, impulse control problems, aggression, depression, suicidality, parkinsonism, and eventually progressive dementia. These symptoms often begin years, or even decades after the last brain trauma or end of active athletic involvement.
How do you get CTE? Can I get CTE from one concussion/hit to the head?
We believe CTE is caused by repetitive brain trauma. This trauma includes both concussions that cause symptoms and subconcussive hits to the head that cause no symptoms. At this time the number or type of hits to the head needed to trigger degenerative changes of the brain is unknown. In addition, it is likely that other factors, such as genetics, may play a role in the development of CTE, as not everyone with a history of repeated brain trauma develops this disease. However, these other factors are not yet understood.
http://www.bu.edu/cte/about/frequently-asked-questions/