WAVELET COHERENCE AND ITS APPLICATION IN ANALYZING AUDITORY AND MOTOR TASK EVENT-RELATED POTENTIALS
Jie Wu, Ning Zhang, Zhuo Yang, Tao Zhang · Acta Biophysica Sinica · 2007
Wavelet coherence method is applied in analyzing single trial of ERP(event-related potential).There are three groups of experiments: auditory single task,motor single task 1 and motor single task 2.Data from 12 participants is analyzed around 40 Hz by wavelet coherence method and the coherence values between prefrontal area and other areas in the brain are calculated.It is found that the coherence values in motor tasks are larger than those in auditory task and there are significantly differences.Furthermore,in different tasks,the distributions of the coherence values are obviously different,and the values are changing in particularly ways according the varying of the time.This analysis indicates that wavelet coherence method has its advantages in investigating short time EEG signals.