The full list of CTE symptoms is still unknown. While more research is needed, the signs appear to be similar to other brain ailments such as Alzheimer’s disease, Parkinson’s disease, and dementia. The abnormal form of the protein tau may be associated with CTE because it is a hallmark stamp of Alzheimer’s. A buildup of another protein in the brain known as beta-amyloid is also common in Alzheimer’s, but not as much in people with CTE.

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