For ROIs, DMN hubs (i.e., PCC and mPFC) and visual cortex (VC) were selected as ROIs (Yeo et al., 2011; Tamber-Rosenau et al., 2013). ROIs were defined by gray-matter voxels within a 10-mm radius of the ROI centroids (Pascual-Marqui et al., 2011; Whitton et al., 2018). All ROIs were centered on the midline to incorporate both hemispheres, with centroid coordinates obtained from the Neurosynth (https:// www.neurosynth.org) meta-analysis maps (as peak voxels) of “default mode” (for the PCC: 0, −50, 30 and the mPFC: 0, 50, 0) and “passive viewing” (for the VC: 0, −90, 20). All coordinates are reported in Montreal Neurologic Institute (MNI) space. For connectivity analysis, both directions for each pair were examined such that the three ROIs resulted in a 3 × 3 matrix of α-GC connectivity for each of the two resting states.
