The term anterior insular point (aip) refers to a superficial feature identified in the human insula (INS) by dissection. It is the border of the anterior short gyrus at the junction of the anterior limiting sulcus and the superior limiting sulcus. In 28% of hemispheres a small sulcus develops at the point splitting the upper end of the gyrus ( Ture-1999 ). The anterior point is not found in macaques or rodents.