Binary Classification Of Hand Movement Directions From Eeg Using Wavelet Phase-Locking
2017 IEEE INTERNATIONAL CONFERENCE ON SYSTEMS, MAN, AND CYBERNETICS (SMC)(2017)
摘要
Phase synchronies are often used to study relationships between different parts of the brain and to identify regions that interact in a coordinated manner for a certain task. In this paper, we propose a wavelet reconstruction and phase-locking-based feature extraction method to visualize and classify the direction-specific phase synchronies between Electroencephalogram (EEG) channel-pairs for hand movements in 4 directions using EEG data collected from 7 subjects performing right hand movements. We then study its discriminative ability by using statistical analysis and report the most informative, direction-specific channels and wavelet levels. Next, we show the discriminative performance of the proposed feature extraction method in the binary classification of 6 direction pairs. Subsequently, we use the Minimum Redundancy Maximum Relevance feature selection algorithm to select features which improved the classification accuracy of our proposed method by 4.39%. Thus, the results demonstrate the potential of proposed wavelet phase-locking method to extract movement direction related information from EEG.
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关键词
Brain-computer interface(BCI), discrete wavelet transform (DWT), phase-locking values (PLV), phase-locking statistics (PLS), movement directions
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