Scoring of large muscle group movements during sleep: an International Restless Legs Syndrome Study Group position statement

Author:

Ferri Raffaele1ORCID,DelRosso Lourdes M2,Provini Federica34,Stefani Ambra5ORCID,Walters Arthur S6,Picchietti Daniel L7

Affiliation:

1. Sleep Research Centre, Department of Neurology I.C., Oasi Research Institute - IRCCS, Troina, Italy

2. Department of Pediatrics and Seattle Children’s Hospital Seattle, University of Washington, Seattle, WA

3. Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy

4. IRCCS, Istituto delle Scienze Neurologiche, Bologna, Italy

5. Sleep Disorders Unit, Department of Neurology, Medical University of Innsbruck, Innsbruck, Austria

6. Sleep Division, Department of Neurology, Vanderbilt University School of Medicine, Nashville, TN

7. School of Medicine, University of Illinois, Carle Illinois College of Medicine, and Carle Foundation Hospital, Urbana, IL

Abstract

Abstract There is a gap in the manuals for scoring sleep-related movements because of the absence of rules for scoring large movements. A taskforce of the International Restless Legs Syndrome Study Group (IRLSSG) elaborated rules that define the detection and quantification of movements involving large muscle groups. Consensus on each of the criteria in this article was reached by testing the presence of consensus on a first proposal; if no consensus was achieved, the concerns were considered and used to modify the proposal. This process was iterated until consensus was reached. A preliminary analysis of the duration of movements involving large muscle groups was also carried out on data from two previous studies, which, however, used a visual analysis of video-polysomnographic (PSG) recordings obtained from children or adults. Technical specifications and scoring rules were designed for the detection and quantification of large muscle group movements during sleep with a duration between 3 and 45 seconds in adults or 3 and 30 seconds in children, characterized by an increase in electromyographic activity and/or the occurrence of movement artifact in any combination of at least two recommended channels and not meeting the criteria for any other type of movement. Large muscle group movements are often accompanied by sleep stage changes, arousals, awakenings, and heart rate rises. The absence of clear and detailed rules defining them has likely impeded the development of studies that might disclose their clinical relevance; these new rules fill this gap.

Funder

NIH

Mundipharma

Xenoport

Arbor

Publisher

Oxford University Press (OUP)

Subject

Physiology (medical),Neurology (clinical)

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