「Heart rate variability and body temperature during the sleep onset period」

Physiological change in heart rate variability and body temperature during the sleep onset period were examined. Charcteristic behavior in those parameters were begun approximate 30 minutes before going to bed. (夜間睡眠の入眠期における体温および心拍間隔の周波数解析結果から、就寝前から入眠に至る特異的な変化が就寝30分前から始まっていることを確認した。)
pp.42-49
Okamoto-Mizuno K, Tanaka H, Komada Y, Mizuno K, Shirakawa S

Sleep Biol Rhythms