Chronic Traumatic Encephalopathy (CTE) is a disease of the brain found in athletes, military veterans, and others with a history of repetitive head impacts. This type of trauma can trigger progressive degeneration of the brain tissue, including the build-up of an abnormal form of a protein called tau.   The brain degeneration is associated with memory loss, confusion, impaired judgment, impulse control problems, aggression, depression, parkinsonism, and eventually progressive dementia.

Below is a video featuring CNN Chief Medical Correspondent Dr. Sanjay Gupta giving an overview of CTE.