(HealthDay News) -- A concussion occurs when a sharp blow or force causes the brain to collide with the rigid bones of the skull. Serious concussions can impact the way brain signals are processed.
People who have had a concussion may need close supervision and medical care, the University of Missouri Health Care says.
The university offers this list of a concussion's common warning signs:
- Severe headache.
- Drowsiness or dizziness.
- Nausea or vomiting.
- One eye pupil that is dilated more than the other.
- Sudden weakness in one arm or leg.
- Memory loss, confusion or forgetfulness.
