title: Long-term changes in sleep patterns in men on the South Polar Plateau.
mesh_terms: D000222:Adaptation, Physiological; D000328:Adult; D000531:Altitude; D000864:Antarctic Regions; D001143:Arousal; D001274:Atmospheric Pressure; D003081:Cold Climate; D004562:Electrocardiography; D004569:Electroencephalography; D004576:Electromyography; D006801:Humans; D000860:Hypoxia; D008297:Male; D011603:Psychophysiology; D012119:Respiration; D012621:Seasons; D012890:Sleep; D012895:Sleep, REM; D013997:Time Factors; D014481:United States