In a severe impact to the head, the brain moves and hits the skull causing injury. During a boxing match, the brain moves from side to side after the impact of a punch. Following a concussion head injury, confusion and disorientation due to temporary distortion of the brain may result.
Update Date 1/15/2014
Updated by: Jacob L. Heller, MD, MHA, Emergency Medicine, Virginia Mason Medical Center, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Bethanne Black, and the A.D.A.M. Editorial team.