Tohoku J. Exp. Med., 1999, 187 (4)

Electromyographic Study Relating to Shoulder Motion: Control of Shoulder Joint by Functional Electrical Stimulation

JUNICHI KAMEYAMA, YASUNOBU HANDA, NOZOMU HOSHIMIYA1 and MINORU SAKURAI2

Department of Anatomy and Advanced Medical Science Tohoku University School of Medicine, Sendai 980-8574, 1Department of Electrical Communication, Faculty of Engineering, Tohoku University, Sendai 980-8579, and 2Department of Orthopeadic Surgery, Tohoku University School of Medicine, Sendai 980-8574

  • The purpose of this study is to create the standard stimulation patterns of shoulder motion from electromyographic (EMG) data in 13 healthy human volunteers in order to control the movement of the paralyzed shoulder in quadriplegic and hemiplegic patients by functional electrical stimulation (FES). Simultaneous EMG measurement was made at 24 points of 17 major muscles relating to shoulder motion. Since the number of the output channels in the portable FES apparatus is limited, 12 major muscles were selected from statistically processing these EMG data and stimulation patterns were created based on the EMG data of these muscles. Thus three standard stimulation patterns were created to move the shoulder, i. e., (i) 90° flexion to 90° horizontal abduction, (ii) 90° flexion to 20° horizontal adduction, and (iii) 90° abduction to 90° horizontal adduction. With the created stimulation patterns, the restoration of the shoulder motion in plegic patients was successful and it will be reported in the next paper.
    Key words--- electromyogram (EMG); shoulder motion; quadriplegic patient; hemiplegic patient
    © 1999 Tohoku University Medical Press

    Tohoku J. Exp. Med., 1999, 187, 339-351
    Present address for Junichi Kameyama, M. D., Department of Orthopeadic, Tohoku Rosai Hospital, 4-3-21 Dainohara, Aoba-ku, Sendai 981-8563, Japan.
    For reprints request, contact J. Kameyama at the address above.

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