title: THE SLEEP-WAKING CYCLE AND PUPILLARY ACTIVITY.
mesh_terms: D000758:Anesthesia; D003624:Darkness; D005221:Fatigue; D006801:Humans; D007498:Iris; D008027:Light; D009482:Neurophysiology; D009900:Optic Nerve; D011680:Pupil; D012890:Sleep; D013564:Sympathetic Nervous System
keywords: ANESTHESIA; DARKNESS; FATIGUE; IRIS; LIGHT; NEUROPHYSIOLOGY; OPTIC NERVE; PUPIL; SLEEP; SYMPATHETIC NERVOUS SYSTEM