The term anterior limiting sulcus refers to one of three components of the limiting sulcus identified by dissection in the human; it partially separates the insula from the orbital gyri of the frontal lobe. The two other parts are the superior limiting sulcus and the inferior limiting sulcus ( Ture-1999 ). It is not found in the macaque where the anterior insula is continuous with the orbital gyri ( Mesulam-1984 ). The limiting sulcus is not present in rodents.