機能的電気刺激(FES)による動作再建のための体幹運動(寝返り)の多チャネル筋電解析

DOI Web Site

書誌事項

タイトル別名
  • MULTICHANNEL EMG ANALYSIS OF THE ROLLING-OVER MOTION FOR THE RESTORATION BY FES

抄録

The application of Functional Electrical Stimulation (FES) to body control has been proposed for the restoration of the voluntary rolling-over motion of a paralyzed body. EMG analysis is performed in order to consider muscle activities for the realization of the rolling-over motion by FES. A normal subject performed the rolling-over motion from the supine position to the lateroabdominal position. The sequence of the rollingover motion was constructed of four phases as follows: 1) flexion of the right lower extremity, 2) internal rotation and adduction of the right hip joint, 3) left rotation of the pelvis, and 4) left rotation of the chest. Multichannel EMG signals measured simultaneously by the bipolar method using percutaneous electrodes were amplified, full-wave-rectified, and smoothed (time constant 1 sec). We obtained valuable data to achieve the rolling-over motion by FES through the analysis of the EMG signals. For example, the activity of the obliquus externus abdominis (left), the rectus abdominis (left), the erector spinae (right), and the quadratus lumborum (right) had a similar pattern during the rolling-over motion, i. e., they increased in the lower-extremity-flexion phase, had a high peak in the hip-rotation-adduction phase, kept a constant level in the pelvis-rotation phase, and decreased in the chest-rotation phase. These muscles are located at the same or symmetrical positions relative to the axis of the body. Hence these results indicated that they seemed to play a synergetic role in the twisting of the chest and the waist, as in a rolling-over motion. The characteristics mentioned above can be useful in the data compression technique for the creation of stimulus patterns of FES, and simplification of the stimulation system. The rolling-over motion by means of FES does not require the precise control which is an important factor in the restoration of the upper extremity motion, e. g., opening or grasping of fingers. The results of this study suggest the fundamental feasibility of the control of the body movement by means of FES. The knowledge will also be applicable to the strengthening of the muscles through Therapeutic Electrical Stimulation (TES).

収録刊行物

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ