Analysis of Conducting Waves Using Multi-channel Surface Electromyogram Depends on Active Electrodes Supported Multiple Directions

Abstract

Surface electromyogram (EMG) is recorded as interference of action potentials produced by some of the motor units of the muscle. If the composition of the interference wave can be analyzed, more detailed mechanism of muscle contraction may be elucidated. In a previous study, the triceps femoris muscle was used as the test muscle for measurement using electrodes arranged in multiple directions. Although it is possible to switch the electrode geometry and extract the obtained conducting waves, it is difficult to estimate the muscle fiber direction. To solve this problem, a new active electrode was proposed. The characteristics of the electrode shape are the same as in the previous study. The objective of this study is to analyze the conducting wave of the feather muscle by performing measurements using the m-ch method and the proposed electrode. Rom the experimental results, in total short-circuit, the electrode was observed to float from the waveform data. In all patterns, the medial head showed a higher number of conducting waves than the lateral head.