Acquisition of Surface EMG Using Flexible and Low-Profile Electrodes for Lower Extremity Neuroprosthetic Control.
Acquisition of Surface EMG Using Flexible and Low-Profile Electrodes for Lower Extremity Neuroprosthetic Control.
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DOI：
10.1109/tmrb.2021.3098952
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发表时间：
2021-08
期刊：
影响因子：
--
通讯作者：
Herr HM
中科院分区：
文献类型：
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作者：
Yeon SH;Shu T;Song H;Hsieh TH;Qiao J;Rogers EA;Gutierrez-Arango S;Israel E;Freed LE;Herr HM
对于下肢（LE）截肢的人来说，由于步态周期期间经历的动态负载，从假肢接受腔内采集表面肌电图（sEMG）仍然是一个重大挑战。然而，这些信号对于理解LE截肢的临床效果和确定主动LE假体的期望控制轨迹都是至关重要的。用于收集接受腔内sEMG的当前解决方案通常是（i）与受试者的规定假肢接受腔和衬垫不兼容，（ii）不舒服，以及（iii）昂贵。这项研究提出了一种替代的插座内表面肌电信号采集范例，使用一种新的灵活和低剖面电极。首先，在一组未截肢的受试者中，将该假体子内衬界面（SLIP）电极的实际性能与市售Ag/AgCl电极的实际性能进行比较。然后，在单侧经胫骨截肢的单个受试者中实施相应的SLIP电极sEMG采集范例，该受试者在平地上进行不受约束的运动和行走。最后，定量问卷表征SLIP电极和商业Ag/AgCl电极仪器设置的主观舒适度。定量分析表明SLIP和Ag/AgCl电极之间的信号质量相当，而定性分析表明使用SLIP电极从LE截肢的负重、非卧床受试者中采集实时sEMG数据的可行性。
For persons with lower extremity (LE) amputation, acquisition of surface electromyography (sEMG) from within the prosthetic socket remains a significant challenge due to the dynamic loads experienced during the gait cycle. However, these signals are critical for both understanding the clinical effects of LE amputation and determining the desired control trajectories of active LE prostheses. Current solutions for collecting within-socket sEMG are generally (i) incompatible with a subject’s prescribed prosthetic socket and liners, (ii) uncomfortable, and (iii) expensive. This study presents an alternative within-socket sEMG acquisition paradigm using a novel flexible and low-profile electrode. First, the practical performance of this Sub-Liner Interface for Prosthetics (SLIP) electrode is compared to that of commercial Ag/AgCl electrodes within a cohort of subjects without amputation. Then, the corresponding SLIP electrode sEMG acquisition paradigm is implemented in a single subject with unilateral transtibial amputation performing unconstrained movements and walking on level ground. Finally, a quantitative questionnaire characterizes subjective comfort for SLIP electrode and commercial Ag/AgCl electrode instrumentation setups. Quantitative analyses suggest comparable signal qualities between SLIP and Ag/AgCl electrodes while qualitative analyses suggest the feasibility of using the SLIP electrode for real-time sEMG data collection from load-bearing, ambulatory subjects with LE amputation.