brain

reading stuff again... -sigh- life is boOring
Concussion.
A concussion results from the brain being battered or violently shaken. Typically, it is followed by a alteration in consciousness. That is, the person is knocked out, loses consciousness, or remains conscious, but appears dazed, witless, disoriented. The term concussion is often used interchangeably with the terms: head injury, mild brain injury, head dinged, or bell rung. It is important to note that a blow to the head is not required for brain damage to occur.

Concussion Symptoms.
Early symptoms of concussion include headache; dizziness or vertigo; lack of awareness of surroundings; and nausea and vomiting. Late symptoms of concussion include: persistent low-grade headache, lightheadedness, poor attention and concentration, memory dysfunction, difficulty doing simple math, difficulty finding words, slowed reaction time, fatiguability, irritability and low frustration threshold, intolerance of bright lights, difficulty focusing vision, intolerance of loud noises, occasional ringing in the ears, anxiety, depression, mood swings, and sleep disturbances