There are more than four million concussions during competitive sports with up to 50 percent going unreported or undiagnosed. A concussion is a traumatic brain injury caused by bump, blow, or jolt to ...

American football has been under a tremendous safety microscope for some time but the conversation around concussions and, specifically, chronic traumatic encephalopathy (CTE), a degenerative brain ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. Dr. Sue Kirelik, medical director for the ...