title: Sleep fragmentation, sleep deprivation, or both.
authors.forename: Edward J
authors.initials: EJ
authors.lastname: Stepanski
mesh_terms: D001143:Arousal / Q000502:physiology; D006970:Disorders of Excessive Somnolence / Q000175:diagnosis / Q000453:epidemiology; D004569:Electroencephalography; D004594:Electrophysiology / Q000295:instrumentation; D006801:Humans; D012892:Sleep Deprivation / Q000175:diagnosis / Q000453:epidemiology*