The sizes of system patches are correlated across subjects, such that system patches within networks tend to be expanded/contracted together, relative to the group-level patches, whereas patches in different networks can expand/contract in opposite directions. (A) Matrix indicating cross-correlations between the sizes of all system patches, correlated across subjects. Patches are sorted by system membership (Fig. 1). Hot colors indicate positive correlations, which occur exclusively within systems, whereas cool colors indicate negative correlations, which occur exclusively between systems. Black indicates that the correlation did not achieve significance at P < 0.05 after Bonferroni correction. (B) Examples of coordinated expansion of the Cingulo-opercular system. From top to bottom, 3 subjects with, respectively, a small system across all patches, a medium-sized system, and a large system. (C) Examples of negative relationships between patch sizes. From top to bottom, three subjects with, respectively, a large Dorsal but a small Ventral Somatomotor system; two moderately-sized systems; and a small Dorsal but a large Ventral Somatomotor system.