These recurring spells are caused by an abnormal action of the brain cells. The actual cause of most epilepsy is unknown.
Electrical activity is affected in a large area of the brain.
This causes the person to shake all over, lose consciousness, and have muscle spasms and convulsions. Only the body functions controlled by that part of the brain are affected. Partial seizures may occur several times a day or only a few times a year. Medication can control or prevent partial seizures. These spells are so short that they may be undetected.