Epilepsy is one of the most common neurologic diseases, present in about 4% of the world's population. The disease can be well controlled with medications alone, but many patients do not respond well to the epileptic medications and thus need surgery to control seizures.
Epilepsy surgery is advised to people who have tried at least two epilepsy drugs without success and have seizures originating on the same place of the brain.
Epilepsy surgery removes or isolates the area of brain where seizures originate. If it is an area of the brain which cannot be removed, the surgeon makes incisions to prevent seizures from spreading to other parts of the brain.