Primary Generalized Seizures
Generalized seizures affect both cerebral hemispheres (sides of the brain) from the beginning of the seizure. It is also possible that a partial seizure can generalize (or spread to other parts of the brain) and turn into a generalized seizure.
Generalized seizures produce loss of consciousness, either briefly or for a longer period of time, and are sub-categorized into several major types: generalized tonic clonic; tonic; myoclonic; absence; and atonic.
There are also many epilepsy syndromes which each affect the person in a different way.