Simulation of surface EMG for the analysis of muscle activity during whole body vibratory stimulation

Antonio Fratini, Paolo Bifulco, Maria Romano, Fabrizio Clemente, Mario Cesarelli

Research output: Contribution to journalArticle

Abstract

This study aims to reproduce the effect of motor-unit synchronization on surface EMG recordings during vibratory stimulation to highlight vibration evoked muscle activity. The authors intended to evaluate, through numerical simulations, the changes in surface EMG spectrum in muscles undergoing whole body vibration stimulation. In some specific bands, in fact, vibration induced motion artifacts are also typically present. In addition, authors meant to compare the simulated EMGs with respect to real recordings in order to discriminate the effect of synchronization of motor units discharges with vibration frequencies from motion artifacts. Computations were performed using a model derived from previous studies and modified to consider the effect of vibratory stimulus, the motor unit synchronization and the endplates-electrodes relative position on the EMG signal. Results revealed that, in particular conditions, synchronization of MUs' discharge generates visible peaks at stimulation frequency and its harmonics. However, only a part of the total power of surface EMGs might be enclosed within artifacts related bands (±1. Hz centered at the stimulation frequency and its superior harmonics) even in case of strong synchronization of motor units discharges with the vibratory stimulus.

Original languageEnglish
Pages (from-to)314-322
Number of pages9
JournalComputer Methods and Programs in Biomedicine
Volume113
Issue number1
DOIs
Publication statusPublished - Jan 2014

Keywords

  • EMG
  • Motion artifact
  • Motor unit synchronization
  • Whole body vibration

ASJC Scopus subject areas

  • Computer Science Applications
  • Software
  • Health Informatics

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