Brain injury is the most common cause of death in trauma victims accounting for about half of deaths at the accident site. The heed injuries are generally blunt and motor vehicle accidents are most frequent. Of particular significance are motorcycle accidents involving passengers without helmet, which produce severe injuries. As many as two thirds of all motor vehicle accident victims sustain some head injury. Complication from closed head injuries are the single largest cause of morbidity and mortality in patients who reach the hospital. Alive of patients who require long term rehabilitation, head trauma is usually the primary injury.