Restoration of lateral hand grasp using natural sensors.
Restoration of lateral hand grasp using natural sensors.
复制标题
使用自然传感器恢复横向手抓握。
作者：
M. Haugland;Andreas Lickel;Ron Riso;Margareth M. Adamczyk;Michael Keith;Inger Lauge Jensen;Jens Haase;T. Sinkjær
设计了一个用于控制C6四肢瘫痪患者握键的闭环控制系统。自然传感器作为反馈信号的来源。皮肤感受器的神经信号由放置在支配食指外侧部分的正中神经的桡分支周围的植入式袖带电极拾取。施加到皮肤上的机械应力，如压力和滑动，导致记录的神经信号的振幅增加。该研究的目的是确定所记录的神经信号是否能够指示在侧向抓握期间物体的滑动，以及是否可以通过功能性电刺激拇指内收肌和屈肌来增加抓握力来阻止滑动。
A closed-loop control system for controlling the key grip of a C6 tetraplegic patient was developed. Natural sensors served as the source of the feedback signal. The neural signals from cutaneous receptors were picked up by an implanted cuff electrode placed around the radial branch of the median nerve innervating the lateral part of the index finger. Mechanical stress applied to the skin, like pressure and slips, resulted in an increase in amplitude of the recorded neural signal. The goal of the study was to determine whether the recorded neural signals were able to indicate the slip of an object during lateral grasp and whether the slip could be stopped by increasing the grasp force through functional electrical stimulation of the thumb adductor and flexor.