Figure 2.

Functional and structural subdivision of the network connecting the IFGop. (A) Three functional subgraphs were identified: Module 1 (blue) connects bilaterally the inferior frontal gyrus and the SMA; Module 2 (red) connects bilaterally the inferior and superior parietal regions; and Module 3 (green) connects bilaterally the striatum and the SMA. On the right, the connection matrix is presented with the nodes reordered according to an optimal modularity partition (Louvain method). (B) Specific tracts underlying these sub-graphs are the bilateral aslant tract (AT), the left superior longitudinal fasciculus (SLF), the left arcuate fasciculus (AF), the bilateral tracts connecting the SMA with the striatum, and the inferior frontal gyrus pars opercularis with the striatum.