Panels (a–e): Significant default mode network (DMN) connections within each frequency band, which contributed to the Random Forest classification of alcohol use disorder (AUD) from control (CTL) individuals based on the importance parameters, viz., p-value (p < 0.05), number of trees, and Gini index as listed in Table 3. Panel (f): Common connections across different frequency bands. The three images within each panel represent three views, respectively: axial or top view, coronal or front view, and sagittal or left view. The blue and red beads represent left and right-sided DMN nodes/seeds respectively, and the connections represented in orange/red and cyan/blue lines indicate hyper- and hypo-connectivity, respectively, in AUD compared to CTL group. Note that one of the four common connections, L.ACC–R.PHG, although shown here in orange/red (panel f), showed hypoconnectivity in beta band (panel d) and hyperconnectivity in gamma bands (panel e).
