Figure 6.

The left-hand panel represents the “default network” (DN) in healthy students of college age. The aging process has negative effects on network interconnectivities represented in the middle panel in particular within a major regional hub that involves the posterior cingulate. In contradistinction, the righthand panel inter-region connectivities (synchronous activity) of the DN following a one-year of aerobic exercise program in comparison to the non-aerobic control group. Walkers after a year demonstrated interregional connectivities not significantly different than college aged young adults (YA) (with permission [80]).