The regional differences of human responses to local cooling stimulation

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  • 局所冷刺激に対する人体反応特性の部位差
  • キョクショレイシゲキ ニ タイスル ジンタイ ハンノウ トクセイ ノ ブイサ

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The purpose of this study is to clarify the effect of local cooling stimulation in the various parts of the human body. The experiments were carried out with eight healthy female volunteers. Skin temperature and heat flux from the human body were measured and thermal sensations were voted. The experimental clothing was a coverall type garment, which could be removed partially at each region of neck, breast, back, upper arm, forearm, thigh and leg. Each exposed area was 400 cm2. The thermal insulation of this clothing was 1.69 clo. By removing each part of the clothing, each subject was locally exposed to the room air environment that was conditioned at a globe temperature of 18.2°C, 50%RH and still air. During the experiment, skin temperatures and heat flux from the human body were measured every 1min. Local skin temperature and local thermal sensation during exposure at the neck were higher than other parts. The decrease rate of neck skin temperature during exposure was the smallest. However, local cooling stimulation of the neck was the most influential in lowering the unexposed skin temperature and thermal sensation of the whole body. At the neck, chest, and back, the increase rate of heat flux from human body during 1 min after starting exposure was about 70 W/m2 and it was higher than that at the extremities.<br>

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