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.
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During spaceflight, reduced gravity impairs convective heat transfer and the efficiency of evaporation.
“During spaceflight these processes can be considerably challenged as reduced gravity impairs convective heat transfer and the efficiency of evaporation10,11.”
From Increased core body temperature in astronauts during long-duration space missions (2017) · cites this paper as [11]
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Increased core body temperature in astronauts during long-duration space missions
Stahn, A. C., Werner, A., Opatz, O., Maggioni, M. A., Steinach, M., von Ahlefeld, V. W., Moore, A., Crucian, B. E., Smith, S. M., Zwart, S. R., et al. (2017) · Scientific Reports · doi:10.1038/s41598-017-15560-w · Cited by 100 · see citing works
- Authors
- Polyakov, V. V., Lacota, N. G., & Gundel, A.
- Affiliations
- Institute of Biomedical Problems (RU)
- Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR) (DE)
- Venue
- Acta Astronautica
- Publisher
- Elsevier BV
- Published
- 2001-08
- Volume
- 49
- Issue
- 3-10
- Pages
- 137-143
- ISSN
- 0094-5765 (ISSN-L)
- OpenAlex
- W2022479370
- Cited by
- 21
- References
- 12
- Citations by year
- 2025: 1 · 2024: 1 · 2023: 1 · 2022: 2 · 2021: 3 · 2020: 1 · 2019: 5 · 2017: 2
- FWCI
- 0.39
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Acta Astronautica (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Health Sciences › Medicine › Physiology › Spaceflight effects on biology
- Health Sciences › Medicine › Physiology › Thermoregulation and physiological responses
- Physical Sciences › Engineering › Aerospace Engineering › Space Exploration and Technology
- Keywords
- thermoregulation, microgravity, Mir space station, simulated microgravity, bed rest, rectal temperature, body surface temperature, entropy, spaceflight physiology
- MeSH terms
- Adaptation, Physiological, Atmospheric Pressure, Bed Rest, Body Temperature Regulation, Female, Humans, Immersion, Male, Social Isolation, Space Flight, Weightlessness, Weightlessness Simulation, Space Suits
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