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An EMG-CT method using multiple surface electrodes in the forearm

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Title: An EMG-CT method using multiple surface electrodes in the forearm
Authors: Nakajima, Yasuhiro Browse this author
Keeratihattayakorn, Saran Browse this author
Yoshinari, Satoshi Browse this author
Tadano, Shigeru Browse this author →KAKEN DB
Keywords: Forearm
Surface electromyography
Muscle activity
Conductive model
Issue Date: Dec-2014
Journal Title: Journal of Electromyography and Kinesiology
Volume: 24
Issue: 6
Start Page: 875
End Page: 880
Publisher DOI: 10.1016/j.jelekin.2014.07.010
PMID: 25156447
Abstract: Electromyography computed tomography (EMG-CT) method is proposed for visualizing the individual muscle activities in the human forearm. An EMG conduction model was formulated for reverse-estimation of muscle activities using EMG signals obtained with multi surface electrodes. The optimization process was calculated using sequential quadratic programming by comparing the estimated EMG values from the model with the measured values. The individual muscle activities in the deep region were estimated and used to produce an EMG tomographic image. For validation of the method, isometric contractions of finger muscles were examined for three subjects, applying a flexion load (4.9, 7.4 and 9.8 N) to the proximal interphalangeal joint of the middle finger. EMG signals in the forearm were recorded during the tasks using multiple surface electrodes, which were bound around the subject’s forearm. The EMG-CT method illustrates the distribution of muscle activities within the forearm. The change in amplitude and area of activated muscles can be observed. The normalized muscle activities of all three subjects appear to increase monotonically with increases in the load. Kinesiologically, this method was able to estimate individual muscle activation values and could provide a novel tool for studying hand function and development of an examination for evaluating rehabilitation.
Type: article (author version)
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 但野 茂

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