Clinical anatomy of thalamogeniculate artery

本文观察了50个前脑半球的丘脑膝状体动脉。这些血管的数量从2到12不等，直径从80到560 μ m不等。丘脑膝状体动脉最常起源于单独的血管，然而，在24%的半球检查，他们共享一个共同的起源地点。常见的茎直径为310至780 μ m（平均562 μ m）。丘脑膝状体动脉分支起源于大脑后动脉脚段或周围段（P2）的半球占80%，起源于P2段的半球占20%，起源于四叠体段的半球占20%，起源于大脑后动脉远段和颞总动脉的半球占13%，起源于大脑后动脉远段和距状动脉或顶枕动脉的半球占7%。丘脑膝状体动脉主要穿过内侧膝状体（75%）、枕（72%）、上级丘臂（38%）、大脑中动脉（36%）和外侧膝状体（7%）。66%的血管瘤位于丘脑膝状体血管与脉络膜后内侧动脉（33%）或中脑丘脑动脉（27%）之间。尽管有这些疾病，在环池内手术时必须保留丘脑膝状体动脉。这些解剖学知识为基底动脉分叉部动脉瘤的夹闭术提供了重要信息。

The thalamogeniculate arteries of 50 forebrain hemishpheres were examined. These vessels varied from 2 to 12 in number, and from 80 to 560 mum in diameter. The thalamogeniculate arteries most often originated as individual vessels ; however, in 24% of the hemispheres examined they shared a common site of origin. The common stems ranged from 310 to 780 mum in diameter (mean, 562 mum). The thalamogeniculate arteries branches arose from the crural or ambient (P2) segment of the posterior cerebral artery in 80% of the hemispheres from the P2 and the quadrigeminal (P3) segment in 20%, from both the distal segment of the posterior cerebral artery and the common temporal artery (13%), or from the distal segment and either the calcarine or parieto-occipital artery (7%). The thalamogeniculate arteries usually penetrate the medial geniculate body (75%), pulvinar (72%), brachium of the superior colliculus (38%), crus cerebri (36%), and lateral geniculate body (7%). The anastomoses were present in 66%, usually between the thalamogeniculate vessels and the medial posterior choroidal artery (33%), or the mesencephalothalamic artery (27%). In spite of the anastomoses, the thalamogeniculate arteries must be spared during surgery within the ambient cistern. These anatomical knowledge gives us many important informations at clipping surgery of basilar bifurcation aneurysm.