Video analysis of motor events in REM sleep behavior disorder.
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.
Frauscher
Birgit
B
Department of Neurology, Innsbruck Medical University, Innsbruck, Austria.
Gschliesser
Viola
V
Department of Neurology, Innsbruck Medical University, Innsbruck, Austria.
Brandauer
Elisabeth
E
Department of Neurology, Innsbruck Medical University, Innsbruck, Austria.
Ulmer
Hanno
H
Department of Statistics, Informatics and Health Economics, Innsbruck Medical University, Innsbruck, Austria.
Peralta
Cecilia M
CM
Department of Neurology, Innsbruck Medical University, Innsbruck, Austria.|Neurological Center Dr. A. Thomson, French Hospital, Buenos Aires, Argentina.
Müller
Jörg
J
Department of Neurology, Innsbruck Medical University, Innsbruck, Austria.
Poewe
Werner
W
Department of Neurology, Innsbruck Medical University, Innsbruck, Austria.
Högl
Birgit
B
Department of Neurology, Innsbruck Medical University, Innsbruck, Austria.
D000368:Aged; D016022:Case-Control Studies; D005260:Female; D007839:Functional Laterality; D006801:Humans; D008297:Male; D008875:Middle Aged; D009043:Motor Activity / Q000502:physiology*; D017286:Polysomnography; D020187:REM Sleep Behavior Disorder / Q000175:diagnosis / Q000503:physiopathology*; D014743:Videotape Recording / Q000379:methods*