운동 의도에 따른 뇌파-근전도 신호 간 연결성 분석

초록

The brain and muscles both of which are composed of top-down structure occur the connectivity with the changeof Electroencephalogram(EEG) and Electromyogram(EMG). In this paper, we studied the difference of functionalconnectivity between brain and muscles that by applying coherence method to EEG and EMG signals when usersexercised upper limb with and without the movement intention. The changes in the EEG and EMG signals wereinspected using coherence method. During the upper limb exercise, the mu (8~14 Hz) and beta (15~30 Hz) rhythmsof the EEG signal at the motor cortex area are activated. And then the beta and piper (30~60 Hz) rhythms of theEMG signal are activated as well. The result of coherence analysis between EEG and EMG showed the coefficientof active exercise including movement intention is significantly higher than passive exercise. The coherencerelations between cognitive response and muscle movement could interpret that the connectivity between the brainand muscle appear during active exercise with movement intention. The feature of coherence between brain andmuscles by the status of movement intention will be useful in designing the rehabilitation system requiring feedbackdepending on the users’ movement intention status.

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