Anomalous Branches of the Cervical Internal Carotid Artery
Figure 1: A left common carotid bifurcation. In the panel on the left, the superior thyroid artery can be seen rising from the distal common carotid. The occipital artery (marked by an asterisk) is traversed superiorly by hypoglossal nerve, and black suture surrounds the ascending pharyngeal artery. The panel on the right shows the carotid vessels lifted up to show posterior aspect.
Figure 2: A right common carotid artery shows the occipital artery (marked by asterisks) and the ascending pharyngeal artery (arrows). Both are rising from the internal carotid artery.
Suresh Ramnath, MBBS, FRCSC
University of Michigan
Department of Neurosurgery