Independent component analysis of mechanomyogram detected with an acceleration sensor in motion

T. Uchiyama, Y. Miyazaki

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

2 Citations (Scopus)

Abstract

Mechanomyography is a novel technique that reveals muscle activity and mechanical properties. A mechanomyogram is often measured with an acceleration sensor. The signal recorded consists of both the mechanomyogram andmotion acceleration. The purpose of this study is to separate the mechanomyogram from the mixed signal measured with an acceleration sensor. Five healthy male subjects participated in the experiment. Each subject sat on a chair, his arm fixed on a smoothly rotating, horizontal disk. Three acceleration sensors were attached to the subject's forearm. The subject was instructed to flex and extend his elbow while tracking a target displayed on a screen. Acceleration was measured during elbow flexion and extension. The independent component analysis was then applied to the recorded signal, and the separated signals were compared to the reference signals. The separated signal corresponding to the mechanomyogram was full-wave rectified and integrated to obtain the time course of the amplitude (IMMG). The reference signal of the mechanomyogram was the second derivative of the displacement mechanomyogram measured with a condenser microphone that is not affected by the motion acceleration. The reference signal of the motion was the second derivative of the elbow angle measured with a goniometer. The mechanomyogram and motion acceleration could be separated by the proposed method. The IMMG agreed with the rectified smoothed reference signal, while the mean power frequency of the separated signal did not agree with that of the reference signal.

Original languageEnglish
Title of host publicationWorld Congress on Medical Physics and Biomedical Engineering
Pages461-464
Number of pages4
DOIs
Publication statusPublished - 2013 Apr 16
EventWorld Congress on Medical Physics and Biomedical Engineering - Beijing, China
Duration: 2012 May 262012 May 31

Publication series

NameIFMBE Proceedings
Volume39 IFMBE
ISSN (Print)1680-0737

Other

OtherWorld Congress on Medical Physics and Biomedical Engineering
CountryChina
CityBeijing
Period12/5/2612/5/31

Keywords

  • acceleration
  • independent component analysis
  • mechanomyogram

ASJC Scopus subject areas

  • Bioengineering
  • Biomedical Engineering

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  • Cite this

    Uchiyama, T., & Miyazaki, Y. (2013). Independent component analysis of mechanomyogram detected with an acceleration sensor in motion. In World Congress on Medical Physics and Biomedical Engineering (pp. 461-464). (IFMBE Proceedings; Vol. 39 IFMBE). https://doi.org/10.1007/978-3-642-29305-4_122