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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.
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