When neurosurgical intervention can help an epileptic patient?

Brain is made up of millions of specialized cells called neurons that have electrical activity. Normally, brain generates very precise electrical impulses in response to a sensory stimulus or to execute a voluntary motor response.

In an epileptic patient, a part or multiple parts of the brain are sending random, uncontrolled, electrical impulses spreading to adjacent brain sometimes to ipsilateral or bilateral hemispheres of brain from a focus, through its neurons. It is similar to spread of fire from a focus to its surroundings. Surgical removal of the epileptic focus is like calming down the source of fire.

If the origin of the fire is from one area, the patient is a good candidate for surgical excision and chances of recovery are bright. The surgical  part of the brain called temporal lobe located in front of ears has the best chance of seizure if the focus is found in this area.