centrality, with chi-squared tests indicating significant differences between the two conditions. Tests were Bonferroni corrected at p < 0.05 to account for multiple comparisons between regions (all pcorrected < 0.05; Calcarine sulcus (Calc): χ2 (1) = 93.86; anterior hippocampus (aHPC): χ2 (1) = 45.92; posterior hippocampus (pHPC): χ2 (1) = 24.66; inferior frontal gyrus, pars opercularis (IFOp): χ2 (1) = 15.38; inferior frontal gyrus, pars triangularis (IFTr): χ2 (1) = 11.00). Two other hubs, precuneus and parahippocampal gyrus, showed higher betweenness centrality for correct – incorrect but at an uncorrected threshold of p < 0.05. Thus, our analyses supported the idea that correct contextual retrieval involved greater overall connectivity across multiple cortical areas, but that this connectivity was most marked at specific brain hubs, supporting our third hypothesis.
