The term area PFop refers to the most rostral area of inferior parietal cortex, a region that is much expanded in humans relative to macaques and chimpanzees. It is bounded dorsally by area PFt, caudally by area PF, rostrally by area 1, and ventrally by area OP4. Defined by multiple criteria, it is fMRI-activated in EMOTION and SOCIAL tasks. It is deactivated in a LANGUAGE task and more deactivated in a FACES task. Other authors have referred to the same topological area as 40 or 72 and 88 of the Vogts ( Glasser-2016 ).