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BRIEF RESEARCH REPORT article

Front. Neurosci.
Sec. Translational Neuroscience
Volume 18 - 2024 | doi: 10.3389/fnins.2024.1382871
This article is part of the Research Topic Advanced Technology for Human Movement Rehabilitation and Enhancement View all 5 articles

Effect of surface electrode recording area on compound muscle action potential scan processing for motor unit number estimation

Provisionally accepted
Dan Zhang Dan Zhang 1Zhiyuan Lu Zhiyuan Lu 2*Weijun Gong Weijun Gong 1,3*Ping Zhou Ping Zhou 2
  • 1 School of Rehabilitation Medicine, Shandong Second Medical University, Weifang, China
  • 2 School of Rehabilitation Science and Engineering, University of Health and Rehabilitation Sciences, Qingdao, Shandong Province, China
  • 3 Beijing Rehabilitation Hospital, Capital Medical University, Beijing, Beijing Municipality, China

The final, formatted version of the article will be published soon.

    Introduction: MScanFit is a model-based algorithm for motor unit number estimation (MUNE) from compound muscle action potential (CMAP) scan data. It is a clinically applicable tool because of its quick and automatic implementation. Electrodes with different recording areas were employed to record CMAP scan data in existing studies. However, the effect of electrode recording area on MScanFit MUNE and other CMAP scan parameters has not been studied. Methods: CMAP scan was performed on the abductor pollicis brevis muscle of both hands on fourteen healthy subjects using three different electrodes with recording areas of 10 mm × 10 mm, 11 mm × 14 mm, and 22 mm × 26 mm, respectively. Motor unit number was estimated using MScanFit for each CMAP scan. Two motor unit number index parameters, i.e. D50 and step index (STEPIX), were also derived from the CMAP scan data. Results: No significant difference in D50, STEPIX, and MScanFit MUNE was observed across three different electrode recording areas, although the amplitude of CMAP decreased significantly when a larger electrode was used. Intraclass correlation coefficients of 0.792 and 0.782 were obtained for MScanFit MUNE and STEPIX, respectively. Discussion: Compared with CMAP amplitude, D50, STEPIX, and MScanFit MUNE are less sensitive to variation in electrode recording area. However, the repeatability of MScanFit MUNE could be compromised by the inconsistency in the electrode recording area.

    Keywords: MScanFit, Motor unit number estimation, Compound muscle action potential scan, Electromyography, Electrode recording area

    Received: 06 Feb 2024; Accepted: 17 Apr 2024.

    Copyright: © 2024 Zhang, Lu, Gong and Zhou. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence:
    Zhiyuan Lu, School of Rehabilitation Science and Engineering, University of Health and Rehabilitation Sciences, Qingdao, Shandong Province, China
    Weijun Gong, School of Rehabilitation Medicine, Shandong Second Medical University, Weifang, China

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