Vasculature and neurovascular relationships of the trigeminal nerve root
Vasculature and neurovascular relationships of the trigeminal nerve root
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DOI：
10.1007/s00701-010-0913-1
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发表时间：
2011-05-01
影响因子：
2.4
通讯作者：
Milisavljevic, Milan
中科院分区：
文献类型：
--
作者：
Cetkovic, Mila;Antunovic, Vaso;Milisavljevic, Milan
三叉神经根（TNR）血供的特殊显微解剖特点及与周围血管的密切关系及其可能的临床意义是本研究的主要原因。25例成人和4例胎儿tnr动脉注射墨汁后，显微解剖并在立体显微镜下观察血管。三叉神经血管的数量在2到5条之间，由以下两条或三条动脉组成：桥外上动脉（92%）、小脑前下动脉（AICA）（88%）、桥外下动脉（72%）和小脑上动脉（SCA）（12%）。三叉血管小枝的平均直径为0.215 mm。一条血管既可以供应神经根的运动部分，也可以供应感觉部分，或者两者兼而有之。三叉血管形成近端环和远端环。近端环位于三叉神经根入口区。它的中央分支沿着TNR延伸到主要的感觉和运动三叉神经核，而其周围的纵向分支沿着TNR束延伸。不完整的远端动脉环在进入蛛网膜套筒之前包围了TNR的中部。TNR最常见的接触部位是SCA（20%）、岩脉或丹迪静脉（24%）和AICA（12%）。观察到的TNR血管特征可作为神经血管减压手术的解剖学基础。
Specific microanatomical characteristics of the trigeminal nerve root (TNR) blood supply and close neurovascular relationships with surrounding vessels as well as their possible clinical significance were the main reasons for this study.The vasculature of 25 adult and four fetal TNRs were microdissected and examined under the stereoscopic microscope, after injecting their arteries with India ink.The trigeminal vessels, which varied between two and five in number, arose from two or three of the following arteries: the superolateral pontine (92%), anterior inferior cerebellar (AICA) (88%), inferolateral pontine (72%), and superior cerebellar (SCA) (12%). The trigeminal vascular twigs had a mean diameter of 0.215 mm. A single vessel may supply either the motor portion of the nerve root or the sensory portion or both. The trigeminal vasculature formed the proximal and distal rings. The proximal ring was located at the trigeminal root entry zone. Its central branches extended along the TNR to the principal sensory and motor trigeminal nuclei while its peripheral longitudinal twigs followed the TNR fascicles. The incomplete distal arterial ring embraced the middle portion of the TNR before the level of its entrance into the arachnoid sleeve. The most frequent contact of the TNR was noticed with the SCA (20%), the petrosal or Dandy's vein (24%), and the AICA (12%).The observed characteristics of the TNR vasculature could be the anatomical basis for decompressive neurovascular surgery.