0378 Sleep Facilitation by an Artificially Carbonated Spring; Body Temperature, EEG and Autonomic Nervous Activity Evaluations. (27th April 2018)

• Record Type: Journal Article
• Authors: Ito, S U; Kanbayashi, T; Suzuki, S; Ito, A; Kimoto, Y; Terui, Y; Satake, M; Shioya, T; Shimizu, T; Nishino, S
• Is Part Of: Sleep. Volume 41(2018)Supplement 1
• Page Start: A144
• Page End: A145
• Publication Date: 2018-04-27
• Subjects: Sleep -- Physiological aspects -- Periodicals; Sleep disorders -- Periodicals; Sommeil -- Aspect physiologique -- Périodiques; Sommeil, Troubles du -- Périodiques; Sleep disorders; Sleep -- Physiological aspects; Sleep -- physiological aspects; Sleep Wake Disorders; Psychophysiology; Electronic journals; Periodicals; 616.8498
• DOI: 10.1093/sleep/zsy061.377
• Languages: English
• ISSNs: 0161-8105

Abstract

Abstract: Introduction: We have been studying sleep facilitation of chloride spring and artificially carbonated spring (ACS). ACS are known to increase peripheral blood flow. We concluded that ACS caused great body temperature change and promoted sleep. On the other hand, ACS are also known to have an effect on the autonomic nervous system, but no one examined simultaneously the effects on sleep and autonomic nerves. Methods: We evaluated the effects of bathing in ACS (Awakomachi, Danrei Co., Japan), and a plain hot bath (PH) on sleep. 11 healthy subjects submerged in a bath (40 °C) for 15 min at 22:00. From 23:00 to the next morning at 7:00, we measured their core body temperature, distal skin temperature, proximal skin temperature, distal-proximal temperature gradient (DPG), electroencephalogram (EEG), and autonomic nervous activity (LF/HF). Subjects were evaluated for subjective parameters (sleepiness, mood, fatigue) and underwent a critical flicker fusion (CFF) test before and after bathing and sleep. They were instructed to sleep from 24:00 to 7:00. Results: The core body temperature during sleep in ACS was significantly lower than that in PH. DPG during sleep in ACS showed significantly higher value than that in PH. This indicated the heat dissipation due to the increase the skin blood flow and the skin vasodilator action of the ACS as in the previous study. In the subjective evaluation, ACS bath was significantly higher value in mood. The autonomic nervous activity (LF / HF) in ACS was stable low values compered with PH, but it did not reach a significant level (p = 0.06). Conclusion: In ACS bath, good quality sleep can be obtained by deep body temperature falling during sleep, but the relaxing effect was insufficient. Support (If Any): N/A.