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J Korean Sleep Res Soc. 2006;3(1):11-21.         doi: https://doi.org/10.13078/jksrs.06003
Motor Control during Sleep
Sun Ju Chung
Department of Neurology, Asan Medical Center, University of Ulsan College of Medicine
Corresponding Author: Sun Ju Chung ,Tel: +82-2-3010-3988, Fax: +82-2-474-4691, Email: sjchung@amc.seoul.kr
Received: 2 June 2006;  Accepted: 20 June 2006.
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The regulation of motor system during awake-sleep states is controlled by well-organized system. During wakefulness, most somatic muscles exhibit a background level of activity. During nonrapid eye movement (NREM) sleep, there is a slight decrease in somatic muscle activity compared with that during wakefulness. During REM sleep, there is a dramatic reduction in ongoing muscle activity to theextent that even background muscle tone is abolished. Throughout REM sleep, there is tonic inhibition of motoneurons, as well as phasically occurring brief periods of motoneuron excitation. There are various sleep disorders that involve abnormal patterns of motor inhibition, excitation, or both. These disorders occur in part, or in whole, because of the abnormal expression of the mechanisms that control muscle activity during REM sleep.
Keywords: Motor control | Rapid eye movement | Nonrapid eye movement
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Active EEG Components During Stage 2 Sleep  2006 June;3(1)
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