It can be classified based on the area of brain it originates from: * frontal <unk>  * occipital<unk>  * temporal <unk>  It can also be * Unilateral * Bilateral
Intermittent rhythmic delta activity
Periodic short-interval diffuse discharges
Inter-ictal spiking
Biphasic and polyphasic sleep
Periodic lateralized epileptiform discharges
Generalized periodic epileptiform discharges
Depolarization-induced suppression of inhibition
Cyclic alternating pattern