The term parietal operculum (Krieg) refers to the most caudal of three parts of the frontoparietal operculum as defined for the human in Duvernoy-1992 and for the macaque in Krieg-1975. In the human it is the same as the parietal operculum except that it does not include the part of the postcentral gyrus that overlies the insula. In the macaque it is the same except that it only includes the most caudal part of the postcentral gyrus that overlies the insula. The other parts are the frontal operculum (Krieg) and the subcentral operculum. It is not present in rodents.