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Behavioral Thermoregulation in Response to Heating and Cooling of the Hypothalamic Preoptic Area of the Dog

Report Number: AMRL TR 67-144
Author: Robinson, James J.
Author: Hammel, Harold T.
Corporate Author: John B. Pierce Foundation Laboratory
Laboratory: Aerospace Medical Research Laboratories
Date of Publication: 1968-02
Pages: 20
Contract: AF 33(615)-2825
Project: 7222
Task: 722207
AD Number: AD0691021

Cooling the hypothalamic-preoptic tissue to a temperature of 32 C causes greatly increased motivation in the dog to press a bar for heat in a cold environment of -5 C. Heating the same region of the brain to a temperature of 42 C causes almost complete suppression of bar pressing. These strong behavioral responses to changes in hypothalamic temperature take place with only very slight changes in rectal temperature. There appears to be an active pathway, between the hypothalamic-preoptic region and the sensory cortex, capable of thermoregulatory function and sensitive to both heat and cold in the hypothalamic-preoptic region.

RAF Centre of Aviation Medicine
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