Perception of Foot Temperature in Young Women with Cold Constitution : Analysis of Skin Temperature and Warm and Cold Sensation Thresholds

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To examine the disease state of cold constitution, physiological measurements of the foot were conducted by investigating thermal sensations under an environmental condition of 25℃-26℃ (neutral temperature) in 29 young women with and without cold constitution. The subjects were classified into 3 groups according to their experiences with cold constitution: cold constitution, intermediate, and normal groups. Foot skin temperature was measured by thermography. Thermal sensations were measured on the dorsum of the left foot using a thermal stimulator. Cold and warm spots on the dorsum of the right foot were ascertained. Thermal stimulation was delivered by a copper probe. No significant differences in foot skin temperature among these 3 groups were identified as measured in a laboratory under neutral temperature conditions. However, the mean warm sensation threshold was +6.3 ± 1.09℃ (mean ± SEM) for the cold constitution group (n = 14), +3.4 ± 2.10℃ (mean ± SEM) for the intermediate group (n = 7), and -0.25 ± 1.96℃ (mean ± SEM) for the normal group (n = 6). The difference was significant between the cold constitution and normal groups. No significant differences among the 3 groups were found in the cold sensation threshold. This may be attributable to the distribution of thermal receptors and to chronically reduced blood flow in subcutaneous tissues, where the skin temperature receptors responsible for temperature sensation are located.
日本生理人類学会の論文

Perception of Foot Temperature in Young Women with Cold Constitution : Analysis of Skin Temperature and Warm and Cold Sensation Thresholds

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