Inferior view of right cerebral hemisphere. The cerebellum has been removed and the temporal lobe resected at the lateral sulcus. The transverse temporal gyri are found within the primary auditory cortex of the temporal lobe located deep within the lateral sulcus. The middle cerebral artery (MCA) is a terminal branch of the internal carotid artery. The MCA is often divided into four parts where the M1 segment typically tracks horizontally along the sphenoid. The M2 segment of MCA often branches anterior to the insula into superior and inferior divisions or trunks. These trunks branch into M3 segments within the lateral sulcus where they will give rise to terminal branches. (Image courtesy of AL Rhoton, Jr.)