The Lasting Effects of Repeated Concussions

Two bisected brains are positioned next to each other. The brain on the left is the brain of a normal 27 year old and has very few dark spaces between its wrinkles. The brain on the right is the brain of Aaron Hernandez and has very prominent, dark spaces between its fold. Two arrows indicate ventricular enlargement and the atrophy of the fornix in the center of the brain.

The devastating and life-altering medical consequences of getting knocked out cold are far from what the movies have made them out to be. Dr. Marian Berryhill of the University of Nevada, Reno Department of Psychology explains the effects of repeated concussions observed in professional athletes.