Kato M, Sugenoya J, Matsumoto T, Nishiyama T, Nishimura N, Inukai Y, Okagawa T, Yonezawa H
Department of Physiology, School of Medicine, Aichi Medical University, Nagakute, Aichi 480-1195, Japan.
Pflugers Arch. 2001 Nov;443(2):175-9. doi: 10.1007/s004240100681.
We studied how facial fanning during hyperthermia improves the thermal comfort sensation. Experiments were carried out on ten male subjects. They were immersed in hot water at 40 degrees C for 45 min. At 20 min and 35 min, fanning (1 m x s(-1)) was applied to their faces for 5 min. Core temperature (Tc) measured as esophageal temperature (Tes) and tympanic temperature (Tty) continued to rise during the immersion, but temporarily decreased during fanning with a delay of 2 or 3 min. Skin temperatures (Ts) on the forehead and cheek continued to increase slightly during immersion, but decreased immediately after the start of fanning. During immersion before face fanning, the time trend of thermal sensation towards the warm level was similar to that of skin temperature on the face, whereas the time trend of thermal comfort ratings towards the uncomfortable level was similar to that of Tc. The scores of both thermal sensation and thermal comfort were reduced significantly immediately after the start of fanning, and their time courses were different to those of Ts and Tty. These results support previous reports that thermal sensation depends on skin temperature, and that thermal comfort depends on both the skin and core temperatures. Moreover, they indicate that both thermal sensation and comfort ratings are affected by the dynamic responses of the cutaneous thermoreceptors when fanning is applied to the face during hyperthermia.
我们研究了高温期间面部扇风如何改善热舒适感。对10名男性受试者进行了实验。他们被浸入40摄氏度的热水中45分钟。在20分钟和35分钟时，对他们的面部进行5分钟的扇风（风速为1米/秒）。以食管温度（Tes）和鼓膜温度（Tty）测量的核心温度（Tc）在浸泡期间持续上升，但在扇风期间暂时下降，延迟2或3分钟。前额和脸颊的皮肤温度（Ts）在浸泡期间继续略有上升，但在扇风开始后立即下降。在面部扇风前的浸泡期间，热感觉向温暖水平的时间趋势与面部皮肤温度的趋势相似，而热舒适评级向不舒服水平的时间趋势与Tc的趋势相似。扇风开始后，热感觉和热舒适的评分立即显著降低，并且它们的时间进程与Ts和Tty的不同。这些结果支持了先前的报告，即热感觉取决于皮肤温度，而热舒适取决于皮肤和核心温度。此外，它们表明，当在高温期间对面部进行扇风时，热感觉和舒适评级都受到皮肤温度感受器动态反应的影响。
