Source:http://linkedlifedata.com/resource/umls/id/C0037320
MSH: A disorder characterized by incomplete arousals from sleep associated with behavior suggesting extreme fright. This condition primarily affects children and young adults and the individual generally has no recall of the event. Episodes tend to occur during stage III or IV. SOMNAMBULISM is frequently associated with this condition. (Adams et al., Principles of Neurology, 6th ed, p391),NCI: A sleep disorder characterized by abrupt awakenings from sleep with a panicky scream, accompanied by signs of autonomic arousal. There is no recall of a nightmare and the person has amnesia for the event in the morning.