Ichie M, Handa Y, Matsushita N, Naito A, Hoshimiya N
Hokuryo FES Clinic, Sendai, Japan.
Front Med Biol Eng. 1995;6(4):291-307.
This paper describes the control of thumb movements by functional electrical stimulation (FES). In order to determine stimulation data of thumb muscles, activities of nine thumb muscles and the palmaris longus were analyzed in normal subjects by averaging their EMGs. In this analysis, it was found that well coordinated contractions of these thumb muscles were required for finer movements and precise positioning of the thumb. Based upon this analysis, several standard stimulation data for the thumb muscles were programmed and stored into a computer-controlled FES system. Input of the threshold and maximum stimulating voltages for individual thumb muscles of normal subjects to the system enabled automatic creation of stimulation data for each subject. The thumb movements of the normal subjects induced by these data were very smooth and their trajectories were reproducible. In addition, precise thumb positioning and joint stability were easily obtained. These standard stimulation data for the thumb muscles were also applied to FES control of a C4 quadriplegic. The controllability of the thumb movements was improved and the reliability of hand tasks achieved by FES was increased.
本文描述了通过功能性电刺激（FES）对拇指运动的控制。为了确定拇指肌肉的刺激数据，通过对正常受试者的九条拇指肌肉和掌长肌的肌电图进行平均分析其活动。在该分析中发现，这些拇指肌肉的良好协调收缩对于拇指的精细运动和精确定位是必需的。基于该分析，为拇指肌肉编程了几个标准刺激数据并存储到计算机控制的FES系统中。将正常受试者个体拇指肌肉的阈值和最大刺激电压输入到系统中，能够为每个受试者自动创建刺激数据。由这些数据诱发的正常受试者的拇指运动非常平滑，其轨迹是可重复的。此外，很容易实现精确的拇指定位和关节稳定性。这些拇指肌肉的标准刺激数据也应用于C4四肢瘫痪者的FES控制。提高了拇指运动的可控性，增加了通过FES实现的手部任务的可靠性。
