Figure 2
From: An excess vessel in the posterior part of the human cerebral arterial circle (CAC): a case series
Modified picture (a) of some cerebral arteries on the basal surface of the brain (b-c): intermediate communicating artery (ICoA) is presented on the left side in the posterior part of the CAC. Insert - a. PCA-P1c, left posterior cerebral artery, pre-communicating part of carotid origin; PCA-P1b, left posterior cerebral artery, pre-communicating part of basilar origin; P2, left and right posterior cerebral arteries, post-communicating parts; PCoA, right posterior communicating artery. Some vascular components are labeled by numerals: 1-2, left and right internal carotid arteries, choroidal and communicating subparts of cerebral part; 3-4, left and right anterior cerebral arteries, pre-communicating parts; 5, anterior communicating artery; 6, basilar artery. Inserts - b, c. Original pictures of the cerebral angioarchitecture before (b) and after (c) move of the oculomotor nerve (III) from the ICoA (arrows). Insert - c. *, left anterior choroidal artery.