title: [Sleep as a restorative process under extreme exposure conditions].
abstract: In 40 aquanauts, a prolonged stay under increased pressure (11 to 46 kgs/cm2) of the oxygen-helium-nitrogen mixture did not affect the average duration of sleep. Slow-wave sleep, mostly its 3 rd and 4 th stages, and paradoxical sleep were significantly decreased whereas the light sleep/profound sleep ratio increased. The cyclic structure of sleep became altered. The longer the exposure to high pressure led to an augmentation of the slow-wave sleep and REM-phase, but the normal cycles terminating with a REM-phase could not be formed during the experiment.
authors.forename: I
authors.initials: I
authors.lastname: Stoilova
mesh_terms: D000328:Adult; D001273:Atmosphere Exposure Chambers; D001274:Atmospheric Pressure; D004562:Electrocardiography; D004569:Electroencephalography; D004576:Electromyography; D004585:Electrooculography; D006371:Helium; D006801:Humans; D009584:Nitrogen; D010100:Oxygen; D012890:Sleep / Q000502:physiology*; D013366:Submarine Medicine; D013997:Time Factors
chemical_list: D006371:Helium; D009584:Nitrogen; D010100:Oxygen
vernacular_title: Son kak vosstanovitel'nyĭ protsess v usloviiakh ékstremal'nykh vozdeĭstviĭ.