Fig. 1.
Age-related differences in primary sensory and motor networks. (A) Statistical maps depict brain regions in which gray matter intensity covaried with that of the seed region of interest (ROI; listed at left) in each group. Structural covariance networks seem spatially well-developed from early ages, with relative persistence in topology across all time points except for a notable expansion in spatial distribution in group 3. Structural covariance MRI (scMRI) data are z-statistic maps (P < 0.001, FWE-corrected) displayed on the custom average T1 template of all subjects. The left side of the image corresponds to the right side of the brain. (B) Plots of voxel counts by group indicate a covariance burst in group 3 before restriction in group 4. The y-axis scale is voxel number (x × 104) from associated statistical maps. CalcS, calcarine sulcus; HG, Heschl's gyrus; PreCG, precentral gyrus; R, right.