The effect of body temperature on the hunting response of the middle finger skin temperature

  • H. A. M. Daanen
  • F. J. G. Van de Linde
  • T. T. Romet
  • M. B. Ducharme
ORIGINAL ARTICLE

DOI: 10.1007/s004210050287

Cite this article as:
Daanen, H., Van de Linde, F., Romet, T. et al. Eur J Appl Physiol (1997) 76: 538. doi:10.1007/s004210050287

Abstract

The relationship between body temperature and the hunting response (intermittent supply of warm blood to cold exposed extremities) was quantified for nine subjects by immersing one hand in 8°C water while their body was either warm, cool or comfortable. Core and skin temperatures were manipulated by exposing the subjects to different ambient temperatures (30, 22, or 15°C), by adjusting their clothing insulation (moderate, light, or none), and by drinking beverages at different temperatures (43, 37 and 0°C). The middle finger temperature (Tfi) response was recorded, together with ear canal (Tear), rectal (Tre), and mean skin temperature (sk). The induced mean Tear changes were −0.34 (0.08) and +0.29 (0.03)°C following consumption of the cold and hot beverage, respectively. sk ranged from 26.7 to 34.5°C during the tests. In the warm environment after a hot drink, the initial finger temperature (Tfi,base) was 35.3 (0.4)°C, the minimum finger temperature during immersion (Tfi,min) was 11.3 (0.5)°C, and 2.6 (0.4) hunting waves occurred in the 30-min immersion period. In the neutral condition (thermoneutral room and beverage) Tfi,base was 32.1 (1.0)°C, Tfi,min was 9.6 (0.3)°C, and 1.6 (0.2) waves occurred. In the cold environment after a cold drink, these values were 19.3 (0.9)°C, 8.7 (0.2)°C, and 0.8 (0.2) waves, respectively. A colder body induced a decrease in the magnitude and frequency of the hunting response. The total heat transferred from the hand to the water, as estimated by the area under the middle finger temperature curve, was also dependent upon the induced increase or decrease in Tear and sk. We conclude that the characteristics of the hunting temperature response curve of the finger are in part determined by core temperature and sk. Both Tfi,min and the maximal finger temperature during immersion were higher when the core temperature was elevated; sk seemed to be an important determinant of the onset time of the cold-induced vasodilation response.

Key words Cold-induced vasodilation Skin temperature Core temperature Cold water immersion Hunting response 

Copyright information

© Springer-Verlag Berlin Heidelberg 1997

Authors and Affiliations

  • H. A. M. Daanen
    • 1
  • F. J. G. Van de Linde
    • 1
  • T. T. Romet
    • 2
  • M. B. Ducharme
    • 2
  1. 1.TNO Human Factors Research Institute, P.O. Box 23, 3769 ZG Soesterberg, The NetherlandsNL
  2. 2.Defence and Civil Institute of Environmental Medicine, North York, Canada M3M 3B9CA