「Effects of head cooling on human sleep stages and body temperature」

This study examined the effect of head cooling on human sleep stages and body temperature. The subjects slept in an air conditioned chamber under 32 degrees C and relative humidity 80% with or without  the use of a cooling pillow. The use of a cooling pillow decrease the whole-body sweat rate during sleep. (頭部冷却が睡眠および体温に及ぼす影響を、高温多湿環境（32度、80%）で冷却枕の使用により検討した。冷却枕使用により睡眠中の全身発汗量が低下した。)
pp.98-102
Okamoto-Mizuno K, Tsuzuki K, Mizuno K

Int J Biometeorol