手部電刺激表面陣列式電極貼片 對於刺激位置之設計 應用於前臂姿態改變之研究

Abstract

手部電刺激輔具可幫助中樞神經損傷者重建一部份手部功能。雖然現今有幾套已發展的手部電刺激輔具，但文獻中鮮少討論刺激位置的移轉，由於皮膚與肌肉之相對滑動，造成傳統電極貼片的配置難以掌握最佳之刺激位置。故本研究將設計一套陣列式電極貼片，對於前臂姿態改變時，了解刺激位置之移轉的問題，進而針對此陣列式電極貼片，提出手部電刺激系統的參數研究。 在發展一套手部電刺激輔具的過程中，發現對手部電刺激時前臂姿態的改變會造成刺激位置的移轉，進而影響電極貼片的位置，故本研究利用邊長5cm × 1cm的長方形電極貼片，設計一套陣列式電極貼片，電極貼片控制器以及電刺激器的開關；本研究藉由陣列式電極貼片，規劃置於手臂表面上，探究刺激位置的移轉，並尋找出前臂姿態的改變對功能性電刺激參數的特性趨勢。

The application of hand functional electrical stimulation (FES) could help patients to restore functions of paralyged limbs. Although several methods had been developed for hand FES, the shift of stimulation sites had been still troublesome. Due to the shift between the skin and muscle, formerly used electrodes could hardly locate on expected stimulation sites. The aim of this research is to design a set of electrode array and investigate the parameters of hand FES. When employing FES on hand, we found that the gesture of rotation of hand would affect stimulation sites and then change the effect of hand FES. By utilizing the set of surface electrode array, we could control the switching and the intensity of FES, and thus decide the stimulated position. The most effective stimulation positions on the surface of forearm and the characteristics of surface electrode array could be found for the variation of forearm gesture.