Dallas Cowboys player who died by suicide diagnosed with brain disease
In the first stage of the disease, some people also experience short-term memory problems, depression, aggressive tendencies, and executive function issues, according to the CTE Society, a nonprofit group.
In its final stage, a person can experience severe cognition issues and memory loss, as well as dementia, according to the CTE Society.
The disease - which is caused by repeated blows to the head - has been found in the brains of dozens of former National Football League (NFL) players.
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