Biomedical Research Institute, Korea Institute of Science and Technology, Hwarang-ro 14-gil 5, Seongbuk-gu, Seoul, 02792, Republic of Korea.
School of Electrical and Electronic Engineering, Yonsei University, 50, Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea.
Ann Biomed Eng. 2019 Mar;47(3):754-766. doi: 10.1007/s10439-018-02181-1. Epub 2018 Dec 17.
Cuff electrodes have been introduced into functional neuromuscular stimulation systems to either obtain neural signals or elicit limb movements. Multiple electrodes must be implanted to construct a feedback control loop, including one electrode for acquisition and another for stimulation. Existing approaches require too much space inside the body and a complicated surgical procedure. This paper proposes a novel neural interface method that uses a single cuff electrode with multichannel capability to simultaneously acquire multichannel recordings and induce electrical stimulation at the proximal nerve trunk of the sciatic nerve. Recordings and stimulation are conducted in a time-shared manner using a path controller. Using the proposed method, joint positions are estimated from multichannel recorded neural signals during electrical stimulation as neural signals are continuously recorded. In addition, the proposed system is shown to be suitable for controlling joint position. The proposed neural interface method overcomes the spatial limitations of electrode implantation and thus offers a new approach to developing compact neural interface systems.
袖带电极已被引入到功能性神经肌肉刺激系统中，以获取神经信号或引发肢体运动。为了构建一个反馈控制回路，必须植入多个电极，包括一个用于采集，另一个用于刺激。现有的方法需要在体内占据太多空间，并且手术过程复杂。本文提出了一种新的神经接口方法，该方法使用具有多通道能力的单个袖带电极，同时在坐骨神经的近端神经干上进行多通道记录和电刺激。使用路径控制器以时分方式进行记录和刺激。使用所提出的方法，在电刺激期间，从多通道记录的神经信号中估计关节位置，因为持续记录神经信号。此外，所提出的系统被证明适合控制关节位置。所提出的神经接口方法克服了电极植入的空间限制，因此为开发紧凑的神经接口系统提供了一种新方法。
