Relationship between Motor Entropy and EMG Entropy in Response to Different Task Demands

Abstract

In the experiment, 10 healthy college-aged individuals (five males, five females, mean age 22 years old) volunteered to participate in the study. They were asked to perform 5 different grip force control tasks. During the experiment, grip force signal and electromyography (EMG) signals were recorded simultaneously. To explore the relationship between grip force and EMG signals in responds to different task demands from an entropy point of view, we utilized fuzzy approximate entropy (fApEn) to reflect the complexity of grip force and EMG signals in this study. The results showed that the fApEn of kinetics decreased when the target was more difficult, while the fApEn of EMG signals increased.