Video analysis of motor events in REM sleep behavior disorder

University of Innsbruck, Innsbruck, Tyrol, Austria
Movement Disorders (Impact Factor: 5.68). 07/2007; 22(10):1464 - 1470. DOI: 10.1002/mds.21561


In REM sleep behavior disorder (RBD), several studies focused on electromyographic characterization of motor activity, whereas video analysis has remained more general. The aim of this study was to undertake a detailed and systematic video analysis. Nine polysomnographic records from 5 Parkinson patients with RBD were analyzed and compared with sex- and age-matched controls. Each motor event in the video during REM sleep was classified according to duration, type of movement, and topographical distribution. In RBD, a mean of 54 ± 23.2 events/10 minutes of REM sleep (total 1392) were identified and visually analyzed. Seventy-five percent of all motor events lasted <2 seconds. Of these events, 1,155 (83.0%) were classified as elementary, 188 (13.5%) as complex behaviors, 50 (3.6%) as violent, and 146 (10.5%) as vocalizations. In the control group, 3.6 ± 2.3 events/10 minutes (total 264) of predominantly elementary simple character (n = 240, 90.9%) were identified. Number and types of motor events differed significantly between patients and controls (P < 0.05). This study shows a very high number and great variety of motor events during REM sleep in symptomatic RBD. However, most motor events are minor, and violent episodes represent only a small fraction. © 2007 Movement Disorder Society

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    • "EEG, electroencephalography; EMG, electromyography. behaviour disorder have even higher rates of motor events during REM sleep, similar to that in patients with ParkinsonÕs disease with REM sleep behaviour disorder (Frauscher et al., 2007), or if alternatively there is only a mild difference in the rate of motor events between patients with narcolepsy with and without REM sleep behaviour disorder. The latter is at least to some extent supported by the existing literature giving evidence that REM sleep behaviour disorder in narcolepsy is of much milder intensity (Tafti et al., 1992) and that it is often polysomnographically not different from narcolepsy without REM sleep behaviour disorder (Ferri et al., 2008). "
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