Figure 2. Within-group ALFF maps of the HC (left) and svMCI (right) groups.

Widely spread regions of parietal, frontal, occipital and temporal lobes exhibited high ALFF values in the both groups. Note that the posterior cingulate (PCC) and adjacent precuneus (PCu) showed the highest ALFF values in the both groups. The statistical threshold was set at P<0.001 for individual voxels and cluster size >324 mm³, which corresponded to a corrected P<0.01 determined by Monte Carlo simulations. L, left; R, right; P, posterior; A, anterior.