Ultradian Rhythms of Body Temperatures in Male Wistar Rats Maintained under Conditions of Constant Illumination
- Authors: Diatroptov M.E.1, Diatroptova M.A.1, Kosyreva A.M.1, Dzhalilova D.S.1, Mkhitarov V.A.1, Mikhailova L.P.1, Makarova O.V.1
-
Affiliations:
- Research Institute of Human Morphology
- Issue: Vol 167, No 6 (2019)
- Pages: 735-739
- Section: Article
- URL: https://journals.rcsi.science/0007-4888/article/view/242074
- DOI: https://doi.org/10.1007/s10517-019-04611-z
- ID: 242074
Cite item
Abstract
We studied the dynamics of the body temperature in mature male Wistar rats maintained under condition of constant illumination. It was shown that body temperature under these conditions varied with a 3-5-h period. The daily dynamics of body temperature summed up over 20-23-day intervals showed a 4-h ultradian rhythm with maxima at 3.35-4.30, 7.35-8.30, 11.35-12.30, 15.35-16.30, 19.35-20.30, and 23.35-00.30 h. During these hours, pronounced (>0.9°C) increase in body temperature was observed by 1.6 times more often than in other eriods. Thus, there are periods during the day when the increase in body temperature in rats in the absence of light cues occurs more often than in other periods of the day. Hence, about 4-h ultradian rhythm of body temperature has an external synchronizer that differs from lighting conditions.
About the authors
M. E. Diatroptov
Research Institute of Human Morphology
Author for correspondence.
Email: diatrom@inbox.ru
Russian Federation, Moscow
M. A. Diatroptova
Research Institute of Human Morphology
Email: diatrom@inbox.ru
Russian Federation, Moscow
A. M. Kosyreva
Research Institute of Human Morphology
Email: diatrom@inbox.ru
Russian Federation, Moscow
D. Sh. Dzhalilova
Research Institute of Human Morphology
Email: diatrom@inbox.ru
Russian Federation, Moscow
V. A. Mkhitarov
Research Institute of Human Morphology
Email: diatrom@inbox.ru
Russian Federation, Moscow
L. P. Mikhailova
Research Institute of Human Morphology
Email: diatrom@inbox.ru
Russian Federation, Moscow
O. V. Makarova
Research Institute of Human Morphology
Email: diatrom@inbox.ru
Russian Federation, Moscow