The term area IP0 refers to the most caudal of three areas, IP0, IP1, and IP2, on the dorsal margin of inferior parietal cortex, a region that is much expanded in humans relative to macaques and chimpanzees. Located in the lateral bank of the posterior intraparietal sulcus, it is bounded dorsally by area IPS1 and area V3B, ventrally by area PGp, caudally by area V3CD and rostrally by area IP1. Defined by multiple criteria, it is fMRI-activated and deactivated relative to neighboring areas in FACES, RELATIONAL, PLACE, AND LANGUAGE tasks ( Glasser-2016 ).