Figure 2.

Selection of tracts that interconnect the regions of the default mode network. In each individual dataset, interconnecting tracts between the PCC and MFC of the default mode network were selected as follows. First, the FACT algorithm was used to trace the total collection of tracts in the human brain. Twenty-seven fiber seeds were started in all voxels of the brain, reconstructing the total collection of fibers (step 1). Second, the PCC was selected from the default mode network cluster map (Fig. 1a). Fibers that touched the PCC region were selected (step 2). Third, the MFC was selected from the default mode network cluster map and from the resulting fibers of step 2 the fibers that touched the MFC regions were selected (step 3). This procedure resulted in the fibers that touched both regions of interest (ROI), selecting the fibers that interconnected the PCC and MFC of the default mode network.