MAPT and posterior cortical atrophy: Imaging studies on PCA have reported the presence of PCA subgroups, with atrophy, hypometabolism and tau uptake mainly in the parieto-occipital cortices (dorsal), temporo-occipital cortices (ventral) and primary occipital cortex (primary occipital).5,79 Our results showed evidence of a positive correlation between DMN within-network connectivity and scores for simultanagnosia, VOSP letters and VOSP cubes, which could indicate involvement of the parietal cortex.