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Thermoregulatory responses as a function of core temperature in humans.
Author(s) -
Cabanac M,
Massonnet B
Publication year - 1977
Publication title -
the journal of physiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.802
H-Index - 240
eISSN - 1469-7793
pISSN - 0022-3751
DOI - 10.1113/jphysiol.1977.sp011732
Subject(s) - vasomotor , thermoregulation , shivering , core temperature , vasoconstriction , core (optical fiber) , medicine , anesthesia , chemistry , materials science , composite material
1. Six healthy humans were immersed sequentially in baths maintained at a steady temperature of either 28 +/‐ 1 or 38‐8 +/‐ 1 degree C. 2. Metabolic heat production was calculated by respiratory gas analysis. A ventilated capsule was placed on the forehead and sweat secretion was calculated from psychrometric recordings. Convective heat loss from one hand to water‐perfused glove provided a continuous measurement of vasomotor response. 3. Heat production, sweating, and vasomotor heat loss were proportional to core temperature. 4. Sweating and vasomotor response were parallel. Vasoconstriction was complete, before the onset of shivering. 5. The thresholds for heat loss and heat production were superimposed, without a 'dead band' core temperature.