title: On sleepening.
authors.forename: M
authors.initials: M
authors.lastname: Critchley
mesh_terms: D001143:Arousal / Q000502:physiology*; D002540:Cerebral Cortex / Q000503:physiopathology; D003405:Creativity; D004325:Dreams / Q000502:physiology; D006212:Hallucinations / Q000503:physiopathology; D006801:Humans; D012894:Sleep Stages / Q000502:physiology*; D012893:Sleep Wake Disorders / Q000503:physiopathology*