[kick]

https://en.wikipedia.org/wiki/Chronic_traumatic_encephalopat...

Chronic traumatic encephalopathy (CTE) is a neurodegenerative disease caused by repeated head injuries.[1] Symptoms may include behavioral problems, mood problems, and problems with thinking.[1] Symptoms typically do not begin until years after the injuries.[2] CTE often gets worse over time and can result in dementia.[2] It is unclear if the risk of suicide is altered.[1]

Most documented cases have occurred in athletes involved in contact sports such as boxing, American football, professional wrestling, ice hockey, rugby, and soccer.[1][4] Other risk factors include being in the military, prior domestic violence, and repeated banging of the head.[1] The exact amount of trauma required for the condition to occur is unknown.[1] Definitive diagnosis can only occur at autopsy.[1] Chronic traumatic encephalopathy is a form of tauopathy.[1]

There is no specific treatment.[3] Rates of disease have been found to be about 30% among those with a history of multiple head injuries.[1] Population rates, however, are unclear.[2] Research in brain damage as a result of repeated head injuries began in the 1920s, at which time the condition was known as dementia pugilistica or "punch drunk syndrome".[1][3] Changing the rules in some sports has been discussed as a means of prevention.[1]