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Skin, preoptic, and core temperatures influence behavioral thermoregulation.

E R Adair

    Journal of Applied Physiology: Respiratory, Environmental and Exercise Physiology
    |April 1, 1977
    PubMed
    Summary
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    Squirrel monkeys regulate air temperature behaviorally. Core body temperature influences how effectively they adjust their thermal environment, impacting behavioral responses.

    Area of Science:

    • Thermoregulation
    • Behavioral Neuroscience
    • Animal Physiology

    Background:

    • Squirrel monkeys (Saimiri sciureus) exhibit behavioral thermoregulation.
    • Previous studies show linear relationships between preoptic area temperature (Tpo) and selected air temperature (Ta).

    Purpose of the Study:

    • To investigate the influence of clamped preoptic temperature (Tpo) on behavioral thermoregulation in squirrel monkeys.
    • To determine the role of extrahypothalamic core body temperature in modulating the gain of behavioral thermoregulatory responses.

    Main Methods:

    • Squirrel monkeys selected between two air temperatures (10°C and 50°C) to regulate their thermal environment.
    • Transient (10-min) displacements of preoptic temperature (Tpo) were applied around neutral and clamped Tpo levels.

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  • Rectal body core temperature was monitored.

    • Main Results:

    • Behavioral adjustments in Ta were linear and inversely proportional to Tpo displacements.
    • Higher clamped Tpo levels resulted in steeper linear functions relating behavioral response to Tpo transients.
    • Core body temperature was driven to non-neutral levels by clamped Tpo and acted as a multiplicative factor influencing the gain of behavioral responses.

    Conclusions:

    • Clamped preoptic temperature significantly alters the gain of behavioral thermoregulation in squirrel monkeys.
    • Core body temperature plays a critical role in modulating the sensitivity of behavioral thermoregulatory effector responses.