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Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Engineering / Faculty of Engineering >
Peer-reviewed Journal Articles, etc >
An EMG-CT method using multiple surface electrodes in the forearm
| 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 | | Optimization | | 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) |
| URI: | http://hdl.handle.net/2115/57471 |
| 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)
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Submitter: 但野 茂
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