Fig 8. Similarity between the allegiance matrices of the multiplex SC-FC graph, the FC graph alone, and the SC graph alone, as a function of the topological scale for the group.

Using a (κ = 1), we calculated the Pearson correlation coefficient for all layers and all layer shifts between the allegiance matrices of (A) the multiplex SC-FC graph and the SC graph, (B) the multiplex SC-FC graph and the FC graph, and (C) the SC graph and the FC graph outside of the multiplex formulation. Layers and shifts with maximum correlation values are marked by $*$. The layer numbers that yield maximum correlation values are also presented on the plots (white). (D-F) Brain overlays show the communities identified at layers with maximal correlation values (panels (A-C)). The color bars in each panel (right hand side) represent the color-coded communities. The multiplex SC-FC communities at low γ layers are very similar to SC communities at slightly higher γ layers (green boxes). Although FC communities overall show smaller similarity to the muliplex SC-FC communities, the multiplex SC-FC communities at higher γ layers show relatively higher similarity to FC communities at high γ layers (red boxes). The smallest similarity is observed between FC and SC graphs, peaking around a coarse scale with small γ values for both modalities (cyan boxes).