Quantification of electromyographic activity during sleep: a phasic electromyographic metric

Journal of Clinical Neurophysiology : Official Publication of the American Electroencephalographic Society
D BliwiseD B Rye

Abstract

Recording of electromyographic (EMG) activity is considered essential for defining rapid eye movement (REM) sleep and for quantifying certain types of movements in sleep, such as periodic leg movements in sleep (PLMS). However, routine analyses of EMG activity beyond such purposes is performed rarely and quantified seldom, and normative data are lacking. In this study, the authors examined systematic application of a visual scoring system for short-duration (approximately 100-millisecond) phasic EMG activity recorded from five different muscle groups (submentalis, left/right anterior tibialis, left/right brachioradialis) recorded from two different age groups of normal subjects and a group of patients with Parkinson's disease. Quantification of this activity was labeled as a phasic electromyographic metric (PEM). PEM data were compiled separately by REM and non-REM sleep. Results indicated that PEM is a normal part of REM sleep in all muscle groups, more specifically constituting about 5% (SD = 3.1%) of 2.5-second intervals of REM sleep in the mentalis in healthy young adults. It occurs at higher rates in patients with Parkinson's disease, and its quantification in the legs may be influenced to some degree by the presence of PL...Continue Reading

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Citations

Mar 1, 2012·Sleep & Breathing = Schlaf & Atmung·Ayşe KutluDerya Karadeniz
Feb 28, 2008·Journal of Clinical Neurophysiology : Official Publication of the American Electroencephalographic Society·Geert MayerKarin Stiasny-Kolster
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