What Is It?
A concussion is a short-term disturbance in brain function caused by a head injury. A concussion often causes:
- Confusion, headache or dizziness
- Loss of consciousness lasting less than 30 minutes or no loss of consciousness at all
- Loss of memory (amnesia) lasting less than 24 hours
Most head injuries happen during motor vehicle accidents, falls, sports and assaults. Alcohol and drug use can be major contributing factors.