Testing for global or system-specific origins of the LPFC GBC–gF effect. A, We separated LPFC connectivity into 3 systems. The cognitive control network was identified using a meta-analysis of cognitive control studies, sensory-motor regions were identified based on probabilistic cytoarchitecture, and the default mode network was identified using a meta-analysis of studies investigating that network. B, LPFC group average connectivity generally had high positive strength for cognitive control regions, low positive and negative strength (combined using absolute values) for sensory-motor regions, and high negative strength for default mode regions. We used the conjunctions between the masks in A along with these group strength ranges to isolate the 3 systems. Individual differences in mean LPFC connectivity with each of the 3 systems correlated with gF, suggesting a truly global origin of the LPFC GBC–gF effect.