Data was collected and coherence was calculated as described in Chorlian et al. (2009) and Meyers et al. (2019). Briefly, eyes-closed resting-state EEG data was recorded from the electrodes of the 10-20 system for a period of 256 seconds, bipolar channels were created by subtraction between sagittally and laterally located pairs of electrodes, and coherence was calculated between 27 pairings of similarly oriented bipolar channels (21 between sagittal channels and 6 between lateral channels) by a Fourier transform method. Two complementary subsets of 10 members each of the between sagittal coherence pairs, anterior (coherence between frontal-central bipolar channels) and posterior (coherence between central-parietal bipolar channels) with identical topographic structure (see Figure 1), were subject to the same analysis as the complete system. The sagittal pairs contain both interhemispheric and intrahemispheric pairs. The 6 lateral coherence coherence pairs are intrahemispheric pairs with left-right symmetry (See Figure 2). A complete table is provided in Section 6.1.
