Understanding of information processing mechanism during sleep-Effects of white noise upon REM sleep-

Accession number;05A0439523
Title;Understanding of information processing mechanism during sleep-Effects of white noise upon REM sleep-
Author;KURABUCHI YOSUKE(Ashikaga Inst. of Technol.)   TOMITA SHIN'ICHI(Ashikaga Inst. of Technol.)   KOBAYASHI TOSHINORI(Ashikaga Inst. of Technol.)   
Journal Title;Research Reports Ashikaga Institute of Technology
Journal Code:G0313A
ISSN:0287-086X
VOL.;NO.39;PAGE.89-92(2005)
Figure&Table&Reference;FIG.3, TBL.3, REF.2
Pub. Country;Japan
Language;Japanese
Abstract;In order to understand information processing mechanism in the human brain during sleep, the white noise was exposed to the subjects during the night sleep. The night sleep was polygraphically recorded from mid night (00:00) to the morning (08:00). The four healthy university students participated in this study, whose ages are from 22yrs to 23yrs. For three of four subjects, the six nights were recorded under the white noise condition in the two weeks. For another subject, the continuous three nights were recorded for the natural sleep, and after that the 12 nights were recorded under the white noise condition in the five weeks. The white noise of 45dB to 65dB was exposed from sleep onset to waking up from the ear phone system. It is found in all four subjects that %SREM of the night sleep under the white noise condition is gradually increased in accordance with the experiment days. On the contrary, %SWS dose not change under experiment days. %SREM of the night sleep under the white noise condition is significantly increased than that of the natural night sleep. On the contrary, the delta band EEG power spectrum density of the night under the white noise condition is smaller than the natural night sleep. These results shows that the white noise exposure give an effects on sleep, particularly, on REM sleep. The increment of REM sleep in the white noise condition suggests that the white noise plays a role as stimulation into the brain, and that the white noise may be participated to some kind of information processing in the brain during sleep. (author abst.)