Within this article, there is a video well worth the 9 ½ minutes in length. This is Your Brain on Football.
While this article (along with the majority of current media attention) is centered on the sport of football, it is important to note that cerebral concussion injuries do occur in other sports. Coaches and parents need to assist in recognizing the signs and symptoms of a concussion since many athletes will not report the injury. There is no such thing as a mild brain injury.