A concussion is an invisible injury that can not be seen by MRI, CAT scan or X-rays. A concussion can affect the way a person thinks, feels and remembers things. Someone with a concussion can be sensitive to loud and repetitive noises and bright noises. It can make a person sleepy, emotional, distracted, moody and forgetful and it can be caused by a hit to the head or whiplash or anything that causes a sharp jarring to the head.
Because it can’t be diagnosed by X-ray, doctors diagnose it by asking questions and getting patients to do simple physical activities — my son had to touch his nose and then touch the doctor’s hand over and over.