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Paper Abstract and Keywords
Presentation 2011-03-07 16:25
Two Dimensional Measurement of Displacement Mechanomyographic Signal
Hisao Oka (Okayama Univ.), Takumu Hattori (Hyogo AssisTech), Tomoki Kitawaki, Motoi Okamoto (Okayama Univ.), Noriaki Ichihashi (Kyoto Univ.), Masaki Yoshida (O.E.C.U.) MBE2010-110
Abstract (in Japanese) (See Japanese page) 
(in English) Skeletal muscle consists of large numbers of motor units, each of which fires independently during voluntary contraction. The myoelectric signal which is recorded on the skin surface, namely a surface electromyogram (sEMG), is a time-related and spatial aggregate of the action potentials of these motor units. Mechanomyographic siganal (MMG) is a skin surface vibration caused by muscle contraction and recorded by an accelerometer, a microphone, a displacement transducer etc. Though the EMG (electromyogram) is a signal to contract a skeletal muscle, the MMG directly reflects the activity of muscle contraction. The two-dimensional generating mechanism of MMG has not been clarified in detail, because the simultaneous and multiple measurements of MMG and its analysis methods were undeveloped. In this study, the displacement MMGs were recorded at twenty-one points within 2x6 cm, and the MMG maps were described, while the electrical stimulation was made on the motor point of biceps brachii, and the spatial propagation of twitch waveform was discussed. As a result, it was clarified that the waveform amplitude decreases with propagation along the longitudinal axis of muscle fiber.
Keyword (in Japanese) (See Japanese page) 
(in English) mechanomyogram / MMG / propagation / muscle contraction / multiple measurement / / /  
Reference Info. IEICE Tech. Rep., vol. 110, no. 460, MBE2010-110, pp. 43-48, March 2011.
Paper # MBE2010-110 
Date of Issue 2011-02-28 (MBE) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF MBE2010-110

Conference Information
Committee NC MBE  
Conference Date 2011-03-07 - 2011-03-09 
Place (in Japanese) (See Japanese page) 
Place (in English) Tamagawa University 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To MBE 
Conference Code 2011-03-NC-MBE 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Two Dimensional Measurement of Displacement Mechanomyographic Signal 
Sub Title (in English)  
Keyword(1) mechanomyogram  
Keyword(2) MMG  
Keyword(3) propagation  
Keyword(4) muscle contraction  
Keyword(5) multiple measurement  
1st Author's Name Hisao Oka  
1st Author's Affiliation Okayama University (Okayama Univ.)
2nd Author's Name Takumu Hattori  
2nd Author's Affiliation The Hyogo Institute of Assistive Technology (Hyogo AssisTech)
3rd Author's Name Tomoki Kitawaki  
3rd Author's Affiliation Okayama University (Okayama Univ.)
4th Author's Name Motoi Okamoto  
4th Author's Affiliation Okayama University (Okayama Univ.)
5th Author's Name Noriaki Ichihashi  
5th Author's Affiliation Kyoto University (Kyoto Univ.)
6th Author's Name Masaki Yoshida  
6th Author's Affiliation Osaka Electro-Communication University (O.E.C.U.)
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Date Time 2011-03-07 16:25:00 
Presentation Time 25 
Registration for MBE 
Paper # IEICE-MBE2010-110 
Volume (vol) IEICE-110 
Number (no) no.460 
Page pp.43-48 
#Pages IEICE-6 
Date of Issue IEICE-MBE-2011-02-28 

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