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Normalisierung der EMG-Aktivität des M. trapezius mithilfe submaximaler Referenzkontraktionen: Schwierigkeiten und Lösungsansätze

Normalization of trapezius muscle EMG with submaximal reference contractions: difficulties and solution approaches

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Zusammenfassung

Submaximale Referenzkontraktionen (RVE) sind bei elektromyographischen (EMG) Messungen des M. trapezius eine international empfohlene Normalisierungsmethode. Die vorliegende Publikation zeigt mögliche Schwierigkeiten dieser Methode und Lösungsansätze auf. Das EMG von 20 Pflegefachangestellten wurde erfasst und mittels submaximaler RVE normalisiert. Es ergab sich ein signifikanter Zusammenhang der Erholzeit und des 10. Perzentils des EMG zu RVE. Dies kann zu einer systematischen Verfälschung der Resultate führen. Mögliche Wege diese Verfälschung abzuschwächen sind das Einbeziehen von RVE in das statistische Modell, eine Verschiebung der gesamten Verteilung oder den Ausschluss von Messungen ausserhalb einer von uns vorgeschlagenen Bandbreite für RVE.

Abstract

Submaximal reference contractions (RVE) are the state of the art for the normalization of electromyographical (EMG) measures of trapezius muscle. The paper shows difficulties and solution approaches of this method. The EMG of trapezius muscle was measured in 20 nurses and was normalized with submaximal RVE. A significant correlation of rest time and RVE as well as a correlation of the 10th percentile of activity and RVE was found that can cause a systematic falsification of results. Possible solution approaches are the inclusion of RVE into the statistic model, adding a constant value to the data, or exclusion of measures beyond a proposed bandwidth of RVE.

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Authors and Affiliations

  1. Departement Gesundheitswissenschaften und Technologie, ETH Zürich, Sonneggstrasse 3, 8092, Zürich, Schweiz

    Corinne Nicoletti MSc ETH Bew.-wiss. & Thomas Läubli MD

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  1. Corinne Nicoletti MSc ETH Bew.-wiss.
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  2. Thomas Läubli MD
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Correspondence to Corinne Nicoletti MSc ETH Bew.-wiss..

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Nicoletti, C., Läubli, T. Normalisierung der EMG-Aktivität des M. trapezius mithilfe submaximaler Referenzkontraktionen: Schwierigkeiten und Lösungsansätze. Zbl Arbeitsmed 63, 250–253 (2013). https://doi.org/10.1007/BF03350861

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  • DOI: https://doi.org/10.1007/BF03350861

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