Chronic traumatic encephalopathy (CTE) is a form of encephalopathy that is a progressive degenerative disease, which can only be definitively diagnosed postmortem, in individuals with a history of multiple concussions and other forms of head injury. The disease was previously called dementia pugilistica (DP), as it was initially found in those with a history of boxing. CTE has been most commonly found in professional athletes participating in American football, ice hockey, professional wrestling and other contact sports who have experienced repetitive brain trauma. It has also been found in soldiers exposed to a blast or a concussive injury,[1] in both cases resulting in characteristic degeneration of brain tissue and the accumulation of tau protein. Individuals with CTE may show symptoms of dementia, such as memory loss, aggression, confusion and depression, which generally appear years or many decades after the trauma.
Repeated concussions and injuries less serious than concussions ("sub-concussions") incurred during the play of contact sports over a long period can result in CTE. In the case of blast injury, a single exposure to a blast and the subsequent violent movement of the head in the blast wind can cause the condition.
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