The term area PFm refers to a cortical structure located in the center of inferior parietal cortex, a region that is much expanded relative to macaques and chimpanzees. It is bounded dorsally by area IP2, caudally by area PGs and area PGi, and rostroventrally by area PF and areas of the temporo-parieto-occipital junction. Defined by multiple criteria, it is transitional between nodes of the default network and the default network. It is fMRI-activated in working memory, MOTOR CUE-AVG, and GAMBLING tasks. It is relatively deactivated in a STORY-MATH task. Other authors have referred to the same topological area as 40 or 89 and 90 of the Vogts ( Glasser-2016 ).