Hypergravic fields and parallel controllers for thermoregulation.

C B Monson; J M Horowitz; B A Horwitz

doi:10.1152/jappl.1983.55.3.990

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Hypergravic fields and parallel controllers for thermoregulation.

C B Monson·J M Horowitz·B A Horwitz

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Abstract

To test the proposal that mammals have parallel neurocontrollers for temperature regulation, Long-Evans hooded male rats were exposed to cold while in a 3-G field. When exposed to cold, these rats consumed 35% less oxygen/min at 3 G than they did when exposed to cold at 1 G. However, rats acclimated for 6 wk to 5 degrees C consumed oxygen at the same rate during cold exposure at 3 G as at 1 G. Because cold-acclimated rats generate heat primarily by nonshivering thermogenesis while rats acclimated to room temperature rely to a greater extent on shivering, the 35% decrease in oxygen consumption of cold-exposed room-temperature rats in 3-G fields may reflect an inactivation of shivering. These oxygen consumption measurements, together with measurements of core and tail temperatures of rats in 3-G fields, are consistent with the proposal that neurocontrollers for thermoregulation are arranged in parallel and can be uncoupled by hypergravic fields.

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Acclimatization Animals Body Temperature Regulation Cold Temperature Gravitation Male Oxygen Consumption Rats Rats, Inbred Strains Restraint, Physical Journal Article Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S.

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C B Monson, J M Horowitz, B A Horwitz. 1983. Hypergravic fields and parallel controllers for thermoregulation.. https://doi.org/10.1152/jappl.1983.55.3.990

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