The NFL instituted a new protocol for handling these events in the 2014 season which requires a cognitive evaluation before a player can return to play.
Ann McKee is the head of a center at Boston University which studies the long-term impact of these events. Eric Lindros was forced to retire from hockey due to these events. A cover-up of the impact of these events on long-term health is the subject of the documentary League of Denial. Bennet Omalu connected these events to chronic traumatic encephalopathy, and was played by Will Smith in a 2015 film titled after one of these events. The NFL instituted a new protocol for handling these events in the 2014 season which requires a cognitive evaluation before a player can return to play. For 10 points, name this type of traumatic brain injury caused by a blow to the head.
Ann McKee is the head of a center at Boston University which studies the long-term impact of these events.
concussions [or mild traumatic brain injury; prompt on brain injury or brain trauma or sub-concussive hits]