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Arousal indexed bidirectional Granger causality values are maximal during the mLPP temporal window. A, Difference (high vs low arousing) of mean bidirectional GC values between right prefrontal and occipitoparietal cortical clusters are plotted for the time intervals of interest. B, Mean relative source power waveforms from each mLPP dipole cluster are plotted for each picture category. o-p, Occipitoparietal.
