Perceptual deprivation phenomena: role of the recumbent position.
D000328:Adult; D001828:Body Image; D004325:Dreams; D004644:Emotions; D006212:Hallucinations; D006801:Humans; D006815:Hunger; D008297:Male; D009949:Orientation; D010465:Perception; D011187:Posture; D011603:Psychophysiology; D012683:Sensory Deprivation; D013060:Speech; D013997:Time Factors