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Rapid brain cooling in the free-running hamster Mesocricetus auratus.

Publication ,  Journal Article
Gordon, CJ; Rezvani, AH; Fruin, ME; Trautwein, S; Heath, JE
Published in: J Appl Physiol Respir Environ Exerc Physiol
November 1981

A thermocouple reentrant tube was stereotaxically implanted in the rostral brain stem of the golden hamster, Mesocricetus auratus. Brain temperature was continuously recorded while the hamster was permitted volitional running on an activity wheel. There was an immediate decrease in brain temperature at the start of running activity, reaching a mean of 0.49 degrees C below the prerunning level. Spontaneous or forced cessation of running activity was associated with a rapid recovery of brain temperature. The time course of brain cooling during exercise greatly differed from the exponential decay of brain temperature in hyperthermic and dead animals. Air flow through the nose may contribute to the maintenance of a low brain temperature because nasal blockade promotes an increase in brain temperature. Below an ambient temperature of 33 degrees C, the resting hamster maintains its brain temperature below deep-body (abdominal) temperature. Vinyl acetate casts of the arterial and venous systems revealed several potential sites for heat exchange that might account for brain cooling under resting and exercising conditions.

Duke Scholars

Published In

J Appl Physiol Respir Environ Exerc Physiol

DOI

ISSN

0161-7567

Publication Date

November 1981

Volume

51

Issue

5

Start / End Page

1349 / 1354

Location

United States

Related Subject Headings

  • Physiology
  • Physical Exertion
  • Mesocricetus
  • Male
  • Cricetinae
  • Brain
  • Body Temperature Regulation
  • Animals
  • 42 Health sciences
  • 32 Biomedical and clinical sciences
 

Citation

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Gordon, C. J., Rezvani, A. H., Fruin, M. E., Trautwein, S., & Heath, J. E. (1981). Rapid brain cooling in the free-running hamster Mesocricetus auratus. J Appl Physiol Respir Environ Exerc Physiol, 51(5), 1349–1354. https://doi.org/10.1152/jappl.1981.51.5.1349
Gordon, C. J., A. H. Rezvani, M. E. Fruin, S. Trautwein, and J. E. Heath. “Rapid brain cooling in the free-running hamster Mesocricetus auratus.J Appl Physiol Respir Environ Exerc Physiol 51, no. 5 (November 1981): 1349–54. https://doi.org/10.1152/jappl.1981.51.5.1349.
Gordon CJ, Rezvani AH, Fruin ME, Trautwein S, Heath JE. Rapid brain cooling in the free-running hamster Mesocricetus auratus. J Appl Physiol Respir Environ Exerc Physiol. 1981 Nov;51(5):1349–54.
Gordon, C. J., et al. “Rapid brain cooling in the free-running hamster Mesocricetus auratus.J Appl Physiol Respir Environ Exerc Physiol, vol. 51, no. 5, Nov. 1981, pp. 1349–54. Pubmed, doi:10.1152/jappl.1981.51.5.1349.
Gordon CJ, Rezvani AH, Fruin ME, Trautwein S, Heath JE. Rapid brain cooling in the free-running hamster Mesocricetus auratus. J Appl Physiol Respir Environ Exerc Physiol. 1981 Nov;51(5):1349–1354.

Published In

J Appl Physiol Respir Environ Exerc Physiol

DOI

ISSN

0161-7567

Publication Date

November 1981

Volume

51

Issue

5

Start / End Page

1349 / 1354

Location

United States

Related Subject Headings

  • Physiology
  • Physical Exertion
  • Mesocricetus
  • Male
  • Cricetinae
  • Brain
  • Body Temperature Regulation
  • Animals
  • 42 Health sciences
  • 32 Biomedical and clinical sciences