title: The hypnagogic state: a critical review of the literature.
mesh_terms: D001307:Auditory Perception; D001921:Brain / Q000502:physiology; D003071:Cognition; D003118:Color Perception; D003469:Culture; D004325:Dreams; D004538:Eidetic Imagery; D005133:Eye Movements; D006801:Humans; D007092:Imagination / Q000187:drug effects; D010551:Personality; D011582:Psychological Theory; D012650:Self Disclosure; D012890:Sleep; D013028:Space Perception; D013404:Suggestion; D014110:Touch; D014473:Unconscious, Psychology; D014796:Visual Perception; D014851:Wakefulness