A cerebral concussion is technically a functional disorder of the brain due to mechanical trauma. It is the easiest form of brain damage wherein functional damage to the brain is present, but organic damage is not. The three main symptoms of brain concussion are loss of consciousness, memory loss (amnesia) and headache. Additional symptoms like vision disturbance, dizziness, loss of balance, confusion, ringing ears, difficulty concentrating and nausea can be also present. Every case of possible brain concussion should be monitored and examined with a CT-scan of the head to exclude organic lesions of the brain (contusions and hemorrhages) and skull (fractures). Because there are no organic lesions present during brain concussion, the symptoms vanish in time ...spontaneously. In case of complications (organic lesions) the existing symptoms become worse and new symptoms occur. Recovery from concussion ranges from days to weeks, depending upon the severity of the concussion and the person's characteristics (age, additional diseases etc.). In general, younger people recover faster from concussions than older people.