| Abstract |
| In this study, we analyzed spatial-frequency relationship related brain function for change of the time during attention al visual stimulus through the analysis of Coherence. With experimentation about ERP(Event Related Potential)data, it revealed that change of the phase synchronization between different scalp locations at band. ERP between left and right frontal lobes, between the frontal and central lobes showed the phase synchronization at the P100, N200, ERP between the frontal and occipital lobes showed the phase synchronization at the P300 related information of visual stimulus. Compared to STFT using the window of a fixed length, CWT is able to multi-resolution analysis with the adjustment of parameters of mother wavelet. Thus, coherence results with CWT was found to be effective for analysis of time-varying spatial-frequency relationship in ERP. The phase synchronization for inattention al visual stimulus was not observed. |
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| Key Words |
| 코히어런스, 단구간 푸리에 변환, 연속 웨이블릿 변환, Coherence, Short-Time Fourier Transform, Continuous Wavelet Transform |
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