title: What a dream is.
mesh_terms: D003071:Cognition; D004325:Dreams; D004569:Electroencephalography; D006801:Humans; D007858:Learning; D008568:Memory; D010465:Perception; D011680:Pupil / Q000502:physiology; D012894:Sleep Stages; D012895:Sleep, REM; D013850:Thinking