Journal of Biomechanical Science and Engineering
Online ISSN : 1880-9863
ISSN-L : 1880-9863
Papers(Special Issue)
Simulation of Force Changes in the Human Biceps Using a Muscle Model Based on Electromyographic Signals
Akira ITOMasami SAITOYoujiro TAMURA
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2010 Volume 5 Issue 1 Pages 18-23

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Abstract

The purpose of this study was to reproduce the force in a voluntary contraction via surface electromyography (SEMG) using a systematic muscle model. We measured the isometric voluntary contractile force and SEMG of the human biceps. We examined the effect of the electrode size on SEMG. A pair of electrodes with a diameter of 1 mm was adopted, because they avoided signal interference from the action potentials of other motor units. We added a converter to the muscle model to obtain an artificial action potential that successively drives an excitation-contraction controller and a motor unit. When the force was less than 30% of the maximum force, EMG signals were obtained from a few motor units. The resultant force coincided well with the experimentally observed force with an accuracy of around 90% when an appropriate threshold level was set up in the converter. This method will increase in performance when we can separately detect the SEMG signals from multipoint measurements.

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© 2010 by The Japan Society of Mechanical Engineers
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