Muscle movement and electrodes motion artifact during vibration treatment

Antonio Fratini, P. Bifulco, M. Cesarelli, M. Romano, G. Pasquariello, A. La Gatta, G. Gargiulo

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Vibration treatment by oscillating platforms is more and more employed in the fields of exercise physiology and bone research. The rationale of this treatment is based on the neuromuscular system response elicited by vibration loads. surface Electromyography (EMG) is largely utilized to assess muscular response elicited by vibrations and Root Mean Square of the electromyography signals is often used as a concise quantitative index of muscle activity; in general, EMG envelope or RMS is expected to increase during vibration. However, it is well known that during surface bio-potential recording, motion artifacts may arise from relative motion between electrodes and skin and between skin layers. Also the only skin stretch, modifying the internal charge distribution, results in a variation of electrode potential. The aim of this study is to highlight the movements of muscles, and the succeeding relevance of motion artifacts on electrodes, in subjects undergoing vibration treatments. EMGs from quadriceps of fifteen subjects were recorded during vibration at different frequencies (15-40 Hz); Triaxial accelerometers were placed onto quadriceps, as close as possible to muscle belly, to monitor motion. The computed muscle belly displacements showed a peculiar behavior reflecting the mechanical properties of the structures involved. Motion artifact related to the impressed vibration have been recognized and related to movement of the soft tissues. In fact large artifacts are visible on EMGs and patellar electrodes recordings during vibration. Signals spectra also revealed sharp peaks corresponding to vibration frequency and its harmonics, in accordance with accelerometers data.

Original languageEnglish
Title of host publicationIFMBE Proceedings
Pages103-106
Number of pages4
Volume20 IFMBE
DOIs
Publication statusPublished - 2008
Event14th Nordic-Baltic Conference on Biomedical Engineering and Medical Physics, NBC 2008 - Riga, Latvia
Duration: Jun 16 2008Jun 20 2008

Other

Other14th Nordic-Baltic Conference on Biomedical Engineering and Medical Physics, NBC 2008
CountryLatvia
CityRiga
Period6/16/086/20/08

Keywords

  • electromyography
  • motion artifact
  • muscle movement
  • vibration treatment

ASJC Scopus subject areas

  • Biomedical Engineering
  • Bioengineering

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