动眼神经池段与周围血管的关系

目的：研究动眼神经池段与周围血管的关系。方法：选取成人头颅标本，红色乳胶灌注，福尔马林固定，在手术显微镜下解剖观测。结果：动眼神经池段腹面的接触血管主要为小脑上动脉(100％)和脑桥后外动脉(42．9％)；背面主要为大脑后动脉(100％)、后交通动脉(14．8％)、四叠体动脉(100％)、副四叠体动脉(10．7％)和脉络膜后动脉(10．7％)。动眼神经滋养动脉主要来自脑底动脉环的后内侧动脉组。穿入动眼神经根的血管主要为四叠体动脉和副四叠体动脉(14．3％)。结论：动眼神经池段与周围血管的关系复杂，该区周围血管的压迫及周围血管的血管瘤可以造成临床眼肌麻痹和相应的中枢神经症状。

Relationship between cisternal segment of oculomotor nerve and its surrounding vessels

Objective: To study the neurovascul ar relationship between cisternal segment of the oculomotor nerve and its surrounding vessels. Methods:Samples of human brain were obtained with arteries system perfused with red latex and fixed in 10% formaldehyde solution. After removal of the hemisphere, the oculomotor nerve was microdissected under the stereoscopic microscope together with the arteries at the base of the brain. Results:The primary vessels in contact with the oculomotor nerve were the superior cerebellar artery (100%) and the posterolateral pontine artery (42.9%) in the ventral surface of the cisternal segment. The dorsal surface of cisternal segment of nerve had close relationship with posterior cerebral artery (100%), the posterior communicating artery (14.8%), the quadrigeminal artery (100%), the accessory quadrigeminal artery (10.7%) and the medial posterior choroidal artery (10.7%). The nutrient arteries of oculomotor nerve mainly originate from the branches of the medial posterior group of the arterial circle in the base of brain. Vascular penetration was noted in 14.3% of the oculomotor nerve, the most common penetrating vessel was the quadrigeminal artery and accessory quadrigeminal artery. Conclusion:The neurovascular relationship in the cisternal segment of the oculomotor nerve is complicated. The vascular compression and the arterial aneurysma of the cisteral segment of the oculomotor nerve may result in clinical ophthalmoplegia and associated nerve symptoms.