A concussion is caused by an external force hitting the head. This can happen anywhere, anytime, and to anyone in situations like sports games, car crashes, or falls. In the U.S. alone, reports estimate over 2.5 million cases of concussion annually.
May be accompanied by temporary loss of consciousness.
Is identified in awake individuals.
Has measures of neurologic and cognitive dysfunction.
Brain Trauma Foundation developed this definition based on the most current evidence available. It is used by leading organizations, such as the NCAA.