This document discusses head and neck injuries, including concussions, skull fractures, cervical spine injuries, and spinal cord injuries. It covers anatomy of the head and neck, evaluation of conscious and unconscious athletes, common injuries, return to play criteria, and special tests to assess range of motion, balance, and cognition. Cervical fractures can cause quadriplegia if the spinal cord is compressed, and second impact syndrome occurs when an athlete sustains a second concussion before symptoms of the first have resolved.
