Direct Myoelectric Control Modifies Lower Limb Functional Connectivity: A Case Study
Direct Myoelectric Control Modifies Lower Limb Functional Connectivity: A Case Study
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直接肌电控制改变下肢功能连接：案例研究
DOI：
10.1109/embc46164.2021.9630844
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Huang, He Helen
中科院分区：
文献类型：
--
作者：
Liu, Wentao;Fleming, Aaron;Lee, I-Chieh;Huang, He Helen
直接肌电控制假肢可以通过输出信号驱动假肢踝关节运动来恢复截肢者的生物力学结构和残余肌肉功能。由于只恢复了前馈控制，目前尚不清楚1)在协调残余和完整肌肉活动中使用了何种神经肌肉控制机制，以及2)在假肢踝关节引导训练中该机制如何变化。为了解决这些问题，我们应用功能连通性分析个体单侧下肢截肢在姿势摇摆任务。在三次训练中，我们建立了11个下肢肌肉表面肌电信号的功能连接网络，以研究不同功能模块之间的耦合。我们观察到功能网络通过训练被重塑，我们发现在截肢者获得更好地控制动力假肢踝关节的技能后，残余和完整的膝关节下方模块之间的联系更强，两侧对称性得到改善。评估阶段显示，即使间隔9个月，功能连通性也在很大程度上得以保留。这项初步研究可能会提供一种独特的方法，揭示在动力假肢踝关节直接肌电图控制的长期训练后发生的潜在神经力学变化。
Prostheses with direct EMG control could restore amputee’s biomechanics structure and residual muscle functions by using efferent signals to drive prosthetic ankle joint movements. Because only feedforward control is restored, it is unclear 1) what neuromuscular control mechanisms are used in coordinating residual and intact muscle activities and 2) how this mechanism changes over guided training with the prosthetic ankle. To address these questions, we applied functional connectivity analysis to an individual with unilateral lower-limb amputation during postural sway task. We built functional connectivity networks of surface EMGs from eleven lower-limb muscles during three sessions to investigate the coupling among different function modules. We observed that functional network was reshaped by training and we identified a stronger connection between residual and intact below knee modules with improved bilateral symmetry after amputee acquired skills to better control the powered prosthetic ankle. The evaluation session showed that functional connectivity was largely preserved even after nine months interval. This preliminary study might inform a unique way to unveil the potential neuromechanic changes that occur after extended training with direct EMG control of a powered prosthetic ankle.
对动力假肢踝关节进行直接连续肌电图控制，以改善引导体育训练后的姿势控制：案例研究
影响因子：
--
作者：
Fleming, Aaron;Huang, Stephanie;Buxton, Elizabeth;Hodges, Frank;Huang, He Helen
通讯作者：
Huang, He Helen
运动单位聚集引起的股阔肌肌电图的贝塔、伽玛带和高频相干性
影响因子：
2
作者：
V. von Tscharner;Martin Ullrich;M. Mohr;Daniel Comaduran Marquez;B. Nigg
通讯作者：
B. Nigg
影响因子：
64.8
作者：
Lee, DD;Seung, HS
通讯作者：
Seung, HS