A seizure is the physical findings or changes in behaviour that occur after an episode of abnormal electrical activity in the brain.
The term “seizure” is often used interchangeably with “convulsion.” Convulsions occur when a person’s body shakes rapidly and uncontrollably. During convulsions, the person’s muscles contract and relax repeatedly. There are many different types of seizures. Some have mild symptoms without shaking.
The following video is of a gentleman having a seizure