Pedroza A, Dujovny M, Artero J C, Umansky F, Berman S K, Diaz F G, Ausman J I, Mirchandani H G
Neurosurgery. 1987 Feb;20(2):228-35. doi: 10.1227/00006123-198702000-00005.
Fifty unfixed cerebral hemispheres were injected with polyester resin and dissected under the operating microscope to show the anatomy of the posterior communicating artery (PCoA). There was a single PCoA in every hemisphere. Eleven (22%) were of fetal origin, and 17 (34%) were hypoplastic. Infundibular dilatations were found in 5 (10%) of the arteries. The outer diameter (OD) of the PCoA at its origin was 1.5 +/- 0.8 mm on the right and 1.6 +/- 0.6 mm on the left. At the junction of the PCoA with the P1 segment of the posterior cerebral artery, the PCoA had an OD of 1.4 +/- 0.7 mm on the right side and 1.6 +/- 0.6 mm on the left. The total length of the PCoA was 12.7 +/- 3.2 mm on the right and 12.5 +/- 1.7 mm on the left side. PCoA branches originated from the superior (36%) or lateral (64%) surface of the PCoA and coursed superiorly, posteriorly, or laterally. These vessels supplied the paramedian perforated substance (21%), the tuber cinereum (16.8%), the sulcus between the optic tract and the tuber cinereum (14.4%), the circuminfundibular anastomosis (11.5%), the mamillary bodies (8.4%), the sulcus between the optic tract and the cerebral peduncles (7.6%), and the cerebral peduncles (5.7%). The largest and most constant branch of the PCoA was the premamillary artery. The number and size of the branches from the PCoA were independent of the size of the parent artery.
对50个未固定的大脑半球注射聚酯树脂，并在手术显微镜下进行解剖，以显示后交通动脉（PCoA）的解剖结构。每个半球均有一条单一的PCoA。其中11条（22%）为胎儿起源，17条（34%）发育不良。在5条（10%）动脉中发现有漏斗状扩张。PCoA起始处的外径，右侧为1.5±0.8mm，左侧为1.6±0.6mm。在PCoA与大脑后动脉P1段的交界处，右侧PCoA的外径为1.4±0.7mm，左侧为1.6±0.6mm。PCoA的总长度，右侧为12.7±3.2mm，左侧为12.5±1.7mm。PCoA分支起源于PCoA的上表面（36%）或侧面（64%），并向上、后或外侧走行。这些血管供应内侧旁穿质（21%）、灰结节（16.8%）、视束与灰结节之间的沟（14.4%）、环漏斗吻合（11.5%）、乳头体（8.4%）、视束与大脑脚之间的沟（7.6%）以及大脑脚（5.7%）。PCoA最大且最恒定的分支是乳头前动脉。PCoA分支的数量和大小与母动脉的大小无关。
