It is well known that there is a definite march of events from onset to ending in the epileptic seizure. The sequence of symptoms differs in the different forms. “Idiopathic” epilepsies have a march through aura, tonus, clonus, and recovery, while Jacksonian organic epilepsies show a characteristic march directly related to their brain anatomical location. Electrically induced therapeutic epilepsy likewise has a march of events which is fairly constant though deviations from the normal pattern do occur, and it is our purpose in what follows to establish and quantitate the normal sequence of events.