To rank the relative importance of each hub to correct spatiotemporal retrieval, we organized each node according to its total degree (i.e., total number of connections, see Methods; for a comparison of betweenness centrality and node degree, see Fig. S3). Consistent with our earlier analysis of betweenness centrality, numerous different edges were involved in correct spatiotemporal retrieval, with hippocampus, visual cortex, and inferior frontal gyrus at the top of the hierarchy (Fig. 2A, right). Overall, the total connectivity in the MTL (aHPC, pHPC, and pPHG) was greater than that in any other brain region (MTL: 51; next highest, visual cortex: 31, χ2 (1) = 4.88, p = 0.027), suggesting a prominent role of this area in successful retrieval of spatiotemporal contextual details (Fig. 2A). Interestingly, while successful retrieval resulted in numerous hubs and many more functional connections than incorrect retrieval, one hub did characterize the incorrect memory network: inferior frontal gyrus, pars orbitalis (IFOr). As shown in the node hierarchy in Figure 2B and in the bar graph in Figure 2D, this region of prefrontal cortex had increased participation during
