Concussion.  The brain in crisis.
D000058:Accidental Falls / Q000706:statistics & numerical data; D000063:Accidents, Traffic / Q000706:statistics & numerical data; D001265:Athletic Injuries / Q000453:epidemiology; D001924:Brain Concussion / Q000175:diagnosis* / Q000453:epidemiology / Q000534:rehabilitation*; D006801:Humans