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Video analysis of motor events in REM sleep behavior disorder
Author(s) -
Frauscher Birgit,
Gschliesser Viola,
Brandauer Elisabeth,
Ulmer Hanno,
Peralta Cecilia M.,
Müller Jörg,
Poewe Werner,
Högl Birgit
Publication year - 2007
Publication title -
movement disorders
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.352
H-Index - 198
eISSN - 1531-8257
pISSN - 0885-3185
DOI - 10.1002/mds.21561
Subject(s) - sleep (system call) , psychology , rem sleep behavior disorder , audiology , physical medicine and rehabilitation , eye movement , non rapid eye movement sleep , rapid eye movement sleep , medicine , neuroscience , polysomnography , electroencephalography , computer science , operating system
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