number of voxels in adults, it would be unsurprising that the highest-degree voxels in adults would be identified within default-like regions. “Hubs” in this scenario are simply members of the largest (whether measured by nodes, voxels, or volume) graph module. Similarly, if this module occupied either a very central or very peripheral role in the overall graph, voxels within the module would tend to have high betweenness centralities (Figure 3). Similar arguments apply to the sensorimotor hubs of infants. Placement of hubs into a graph layout could reveal the reason for the congruence between degree and betweenness centrality, but without such information, it is difficult to evaluate the meaning of these findings, though they clearly indicate differences in the functional network structures of infants and adults.
