握力及捏力控制的前臂及手部多肌肉协调性递归网络分析

doi:10.3969/j.issn.0258-8021.2021.04.07

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Abstract The aim of this study is to explore the muscle coordination of forearm and hand for the grip and pinch control. There were 24 right-handed healthy subjects participating in the experiment. Subjects were requested to produce precisely 30%, 50% and 70% maximum voluntary contraction (MVC) of grip and pinch, during which the surface electromyography (sEMG) signals were recorded from brachioradialis (BR), flexor carpi ulnaris (FCU), flexor carpi radialis (FCR), extensor digitorum communis (EDC), flexor digitorum superficialis (FDS), abductor pollicis brevis (APB), first dorsal interosseous (FDI) and abductor digitiminimi (ADM). The recurrence networks (RNs) and multiplex recurrence networks (MRNs) based on multivariate sEMG signals were constructed and then analyzed by the average shortest path length (L), the clustering coefficient (C) and the interlayer mutual information (I), the average edge overlap (ω). Results showed that the RNs of BR, FCU and FCR during grip performed significantly higher C values than that during pinch under three force levels, take FCR as an example, grip vs pinch: 0.393 ± 0.040 vs 0.366 ± 0.035, 0.404 ± 0.040 vs 0.372 ± 0.035, 0.412 ± 0.051 vs 0.383 ± 0.040, P<0.05;while for the RNs of FDI, grip vs pinch: 0.443 ± 0.035 vs 0.462 ± 0.046, 0.446 ± 0.032 vs 0.461 ± 0.035, 0.445 ± 0.040 vs 0.465 ± 0.038, P<0.05. However, the L values of BR, FCU and FCR of RNs during pinch were significantly higher than that during grip at three force levels, take FCU as an example, grip vs pinch: 2.870 ± 0.063 vs 2.941 ± 0.124, 2.841 ± 0.065 vs 2.941 ± 0.079, 2.830 ± 0.083 vs 2.901 ± 0.051, P<0.05. The I and ω values of extrinsic MRNs under 50% and 70% MVC during grip were 4.056 ± 0.248 and 4.099 ± 0.232, 0.253 ± 0.015 and 0.257 ± 0.017, which were significantly higher than that during pinch (3.930 ± 0.229 and 3.939 ± 0.195, 0.245 ± 0.011 and 0.246 ± 0.012, P<0.05). In addition, the C of BR, FCU and FCR increased, the L decreased, and the I and ω of the extrinsic muscles MRNs increased with the grip force augmented. These results suggested different muscle coordination pattern between grip and pinch, and theintermuscular similarity and synchronization of extrinsic muscleswouldfuther augmente with the increased force level. These findings revealed the dynamical coordination across muscles with the force outputs and provided novel strategy for evaluating the neuromuscular function and making of the myoelectric prosthesis.

Key words： muscle coordination EMG recurrence network grip pinch

Received: 05 November 2020

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R318

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	Zhang Na
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Cite this article:

Zhang Na,Li Ke. Recurrence Networks Analysis of Multiple Muscles coordination of Forearm and Hand for the Grip and Pinch Control[J]. Chinese Journal of Biomedical Engineering, 2021, 40(4): 438-445.

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http://cjbme.csbme.org/EN/10.3969/j.issn.0258-8021.2021.04.07 OR http://cjbme.csbme.org/EN/Y2021/V40/I4/438

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