抄録
Field accident in American football causes traumatic brain injuries such as concussion and subdural hematoma. It is highly possible that serious brain injury is developed by repeated concussions during a comparatively-short term. Therefore, it is difficult to judge when the injured players are returned to games. We obtained the videotapes in which a head-to-head collision in actual American football game was recorded. A struck player developed concussion without loss of consciousness, with loss of memory and with no apparent abnormalities by CT scan. A reconstruction simulation of player's head collision using mathematical dynamic model (MADYMO) and finite element (FE) head and helmet model was conducted based on the accident videotapes.
