what are seizures
A seizure is a sudden change in the brain's normal electrical activity. During a seizure, brain cells fire uncontrollably at up to four times their normal rate, temporarily affecting the way a person behaves, moves, thinks or feels. There are two major types of seizures: 1  Primary generalized seizures â The seizure affects the entire cerebral cortex, the outer portion of the brain that contains the majority of brain cells. 2  Partial (focal) seizure â The abnormal firing of brain cells begins in one region of the brain and remains in that one region.