Why are concussions so hard to detect?

According to the Centers for Disease Control and Prevention over 200,000 young children go to the emergency room for traumatic brain injuries and concussions each year. Concussions are caused when a jolt to the body causes the brain to move. Julie Gilchrist, M.D., compares the brain to the yolk of an egg and the rest of the body to the shell, "you can break the yolk without ever damaging the shel....
Source: Sound Medicine - Category: Global & Universal Authors: Source Type: news