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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Basic rest activity cycle ： ウィキペディア英語版 Basic rest activity cycle The existence of a Basic Rest - Activity Cycle, or BRAC, during both sleep and wakefulness was proposed by Nathaniel Kleitman.〔Kleitman, N., ''Sleep and Wakefulness'', 1963, Reprint 1987: ISBN 9780226440736〕 It is a human biological cycle of approximately 90 minutes (80–120 minutes〔Kleitman, N., ''Basic rest-activity cycle—22 years later'', Journal of Sleep Research & Sleep Medicine, Vol 5(4), Dec 1982, 311-317〕) that is characterized by different level of excitement and rest. The cycle is controlled by the human biological clock. It is best observed in stages of sleep, for example, REM and the delta activity cycle.〔(Dictionary Definition of basic rest-activity cycle )〕 When awake, your brainwaves are faster during the first half of your BRAC, when you feel alert and focused, and then your brainwaves slow during the second half, till you reach the last 20 minutes when you feel dreamy and perhaps a little tired, while your body's being readied for the alert part of the following BRAC; when asleep, your brainwaves first slow and then rise, and the BRAC occurs as stages of sleep — first falling into deep sleep, then rising into the REM (Rapid Eye-Movement) stage, when dreams occur.〔(| "Basic Rest and Activity Cycles," -Polyphasic Society )〕 ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Basic rest activity cycle」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.