Time-Frequency Spatial Wavelet Phase Coherence Analysis of EEG in EC and EO during Resting State

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Abstract

The electrophysiological brain activities are nonlinear in nature as measured by Electroencephalography (EEG). There are coherent activities in brain not only seen during explicit tasks but also during rest. This article aims to investigate the Wavelet based Phase coherence of oscillations of eye closed and eye open signals during resting states. The wavelet coherence is computed for selected 19 electrodes according to 10-20 system from 129 channel EEG signals. The significance was obtained using Wilcoxon Signed Rank test and pairwise wavelet coherence was computed for each possible combination. The Wavelet Phase Coherence using Wavelet Transform gives significantly high results (P<0.05) in EC and EO signals during resting states in frequency interval 0.5-50 Hz overall as well as in the band intervals such as delta (05-4 Hz), theta (4-7 Hz), alpha (7-13 Hz), beta (13-22 Hz) and gamma (22-50 Hz).

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Hussain, L., & Aziz, W. (2016). Time-Frequency Spatial Wavelet Phase Coherence Analysis of EEG in EC and EO during Resting State. In Procedia Computer Science (Vol. 95, pp. 297–302). Elsevier B.V. https://doi.org/10.1016/j.procs.2016.09.338

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