Influence of skin temperature on central thermoregulatory control of leg blood flow

D. W. Proppe

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

This study examined the influence of elevated skin temperature (T(sk)) on the central thermoregulatory control of leg blood flow in five unanesthetized, chronically instrumented, resting baboons (Papio anubis and P. cynocephalus). In each experiment, mean iliac blood flow (MIBF), mean arterial blood pressure, arterial blood temperature (T(bl)), and T(sk) were measured, and iliac vascular conductance (IVC) was calculated. A heat exchanger was incorporated into a chronic arteriovenous femoral shunt to control T(bl). The protocol consisted of raising T(bl) approximately 2.6°C in thermoneutral environment (cool T(sk)) and then again after T(sk) had been elevated by environmental heating. A major influence of raising T(sk) was the lowering of threshold T(bl) at which the rise in MIBF and IVC commenced. This threshold T(bl) was lowered at least 0.8°C on the average. Also, over the whole range of T(bl) studied (37.0-39.6°C), MIBF and IVC were higher at high T(sk) than at cool T(sk). Thus an elevation of T(sk) significantly influences the control of skin blood flow by central thermoreceptors.

Original languageEnglish (US)
Pages (from-to)974-978
Number of pages5
JournalJournal of Applied Physiology Respiratory Environmental and Exercise Physiology
Volume50
Issue number5
DOIs
StatePublished - 1981

ASJC Scopus subject areas

  • Physiology
  • Endocrinology

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