Figure 4:

Model 2A. Model 2A demonstrates the specificity of the frontal-parietal white matter by adding an additional white matter pathway, the corticospinal tract, to the model. The CST not only allows for covariance between two distinct white matter regions, but it also shows that different white matter pathways are related to separate aspects of cognition. Years of education and sex were regressed from all latent variables modeled. Note: EF = executive function; PS = processing speed; CSTFA= corticospinal tract fractional anisotropy; WMFA = white matter fractional anisotropy; FA = fractional anisotropy; IFOF = inferior frontal occipital fasciculus; SLF = superior longitudinal fasciculus; CWI = color word interference; EDU = years of education.