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  • Title: Anticipatory fall in core temperature in rats acclimated to heat given for various hours at a fixed daily time.
    Author: Hara T, Yamasaki H, Hashimoto M, Shido O.
    Journal: Jpn J Physiol; 2001 Jun; 51(3):381-4. PubMed ID: 11492963.
    Abstract:
    Rats were subjected to daily heat exposure limited to a fixed time for 10 consecutive days. An ambient temperature (T(a)) inside an animal room initially set at 24.0 degrees C was raised to 32.0 degrees C, starting at the middle of the dark phase. The high T(a) was maintained for a subsequent 1.5, 3, or 5 h and was then returned to 24.0 degrees C. After the heat exposure schedule, their core temperature significantly fell for about 30 min before and during the period when they had previously been exposed to heat without thermal stimuli. In rats, a time memory for heat exposure could be formed even when the duration of daily heat exposure was short.
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