Figure 4.

Three-dimension rendering of voxel-wise correlations between CBF and test scores on 2 cognitive domains: Immediate Memory (A) and Working Memory (B) within the asymptomatic cohort. The images show that CBF in the precuneus and posterior cingulate are positively correlated with performance on these cognitive domains. Analyses were adjusted for age, education, and post-labeling delay. Results were thresholded at P_voxel <0.005 and minimum of 101 contiguous voxels, based on Monte Carlo simulations (3dClustSim, AFNI, http://afni.nimh.nih.gov). CBF = cerebral blood flow.