title: Human thermohomeostasis onboard "Mir" and in simulated microgravity studies.
abstract: Significant changes of thermogomeostatic parameters was obtained by thermotopometric method using the techniques simulate of microgravity effects: bed rest, pressurized isolation, suit immersion (SI). However, each of ground models made rectal temperature (T) trend downward. The autothermometric study (24 and 12 sessions, 2-13th and 6-174th flight days) was carried out onboard "Mir" by two flight engineers who had preliminary tested at SI (1-2 days). Studies of German investigators onboard "Mir" confirmed: rectal T must be higher in space flight as compared to the normal environment (n=4). Comparative studies suggest that microgravity is a key factor for the human body surface T raise and abolishment of the external/internal T-gradient. T-homeostasis was not really changing during missions and could be regarded as acute effect of microgravity. After delineation of changes in body surface T--by Carnot's thermodynamic law--rectal T raise should have been anticipated. Facts pointing to the excess entropy of human body must not be passed over.
authors.affiliation: Institute for Biomedical Problems, Khoroshevskoye shosse, 76a, 123007 Moscow, Russia.
authors.forename: V V
authors.initials: VV
authors.lastname: Polyakov
authors.forename: N G
authors.initials: NG
authors.lastname: Lacota
authors.forename: A
authors.initials: A
authors.lastname: Gundel
mesh_terms: D000222:Adaptation, Physiological / Q000502:physiology*; D001274:Atmospheric Pressure; D001510:Bed Rest; D001833:Body Temperature Regulation / Q000502:physiology*; D005260:Female; D006801:Humans; D007101:Immersion; D008297:Male; D012934:Social Isolation; D013026:Space Flight; D019442:Space Suits; D014893:Weightlessness; D018474:Weightlessness Simulation