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Dr. Ann McKee grew up a football fan and never considered the repetitive hits sustained by football players would lead to brain abnormalities identical to what she found in the brain of boxers.

Genes, sleep, an active mind, and when a person starts playing football may all play a factor in the development of CTE. Dr. Ann McKee explains what researchers have learned, and what's on the horizon.

Dr. Ann McKee says that "blast injury is not a 'pure' injury" because it generally involves a further impact injury, such as hitting your head on the wall of a Humvee.

Dr. Ann McKee knows that physical exercise is healthy for the mind and the body, but it's important to do it safely to minimize the chances of brain injury.

Dr. Ann McKee is a nerve pathologist who has spent decades learning about the brains of individuals who died from Parkinson's, Alzheimer's, and CTE. She talks about what is involved in her study.

USA Today's Just the FAQs explains Chronic Traumatic Encephalopathy, a neurodegenerative brain disease found in people who have experienced repetitive hits to the head.

Dr. David Arciniegas explains why recovery predictions are so difficult to make and what he looks at to predict where recovery is likely to go.