Adaptive Stimulation Profiles Modulation for Foot Drop Correction Using Functional Electrical Stimulation: A Proof of Concept Study
Adaptive Stimulation Profiles Modulation for Foot Drop Correction Using Functional Electrical Stimulation: A Proof of Concept Study
复制标题
使用功能性电刺激进行足下垂矫正的自适应刺激曲线调制：概念研究证明
DOI：
10.1109/jbhi.2020.2989747
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发表时间：
2021-01-01
影响因子：
7.7
通讯作者：
Yang, Yuan
中科院分区：
文献类型：
--
作者：
Li, Yurong;Yang, Xu;Yang, Yuan
功能性电刺激（FES）为足下垂（FD）的矫正提供了一种有效的方法。为了克服现有方法中的冗余和盲目刺激问题，本研究提出了一种自适应肌电图（EMG）调制刺激曲线的闭环方案。所开发的方法检测实时角速度在步行过程中。它为长短期记忆（LSTM）神经网络提供反馈，用于预测同步胫骨前肌（TA）EMG。基于预测，它调节刺激强度，考虑到受试者特定的死区和电诱发激活的饱和度。所提出的方法进行了测试，对10个健全的参与者和6个FD科目的概念证明。实验结果表明，该方法能够成功地诱导踝关节背屈，并产生与自然步态相似的激活模式，平均相关系数为0.9021。因此，所提出的方法有可能帮助患者恢复正常步态。
Functional electrical stimulation (FES) provides an effective way for foot drop (FD) correction. To overcome the redundant and blind stimulation problems in the state-of-the-art methods, this study proposes a closed-loop scheme for an adaptive electromyography (EMG)-modulated stimulation profile. The developed method detects real-time angular velocity during walking. It provides feedbacks to a long short-term memory (LSTM) neural network for predicting synchronous tibialis anterior (TA) EMG. Based on the prediction, it modulates the stimulation intensity, taking into account of the subject-specific dead zone and saturation of the electrically evoked activation. The proposed method is tested on ten able-bodied participants and six FD subjects as proof of concept. The experimental results show that the proposed method can successfully induce the dorsiflexion of the ankle joint, and generate an activation pattern similar to a natural gait, with the mean Correlation Coefficient of 0.9021. Thus, the proposed method has the potential to help patients to retrieve normal gait.