English: (A) Regions of GM significantly correlated with social network size [top panel, p<0.001 uncorrected, bilateral cluster extent 2.625 mm3 (left) and 5.375 mm3 (right)] and overlapped with dominance status in right and left mSTS and extending onto the immediately adjacent inferior temporal gyrus (middle panel; cluster corrected p<0.05). For illustrative scatter plots, the Jacobian determinants from the dominance (red) and social network size (SNS; green) analyses were extracted from 3.375 mm3 masks placed over the centers of gravity of left and right hemisphere overlap clusters and compared with dominance (red) or social group size (green) after controlling for age, weight, sex, number of structural scans (lower panel). Voxels in which portions of the variance in GM were explained by both social network size and dominance appear as yellow. (B) Voxels in which GM is significantly correlated with social network size and with social status overlap in the rostral and dorsal PFC in the principal sulcus (right panel; cluster corrected p<0.05). The scatter plots are made in the same way as for (A). PS, principal sulcus; AS, arcuate sulcus; LOS, lateral occipital sulcus; STS, superior temporal sulcus.