title: Study of man during a 56-day exposure to an oxygen-helium atmosphere at 258 mm. Hg total pressure. 13. Behavior factors.
mesh_terms: D000223:Adaptation, Psychological; D000328:Adult; D001274:Atmospheric Pressure; D018504:Ecological Systems, Closed; D006371:Helium; D006801:Humans; D008297:Male; D009048:Motor Skills; D010100:Oxygen; D012890:Sleep
chemical_list: D006371:Helium; D010100:Oxygen