The typical symptoms of childhood epilepsy include sudden loss of consciousness, followed initially by tonic and then clonic convulsions, often accompanied by screaming, cyanotic facial complexion, frothing or bleeding at the mouth, dilated pupils, generally lasting 40 seconds or up to 15 minutes. The convulsive seizure stops naturally, followed by a state of coma. Of course, some affected children also display varying degrees of consciousness disorders, evident disruptions in thinking, perception, emotion, and psychomotor functions, and may show signs of conditions like somnambulism and noctambulism, among other automatisms.