乙状窦后和乙状窦后—内耳道上入路的显微解剖研究

发布时间：2018-02-26 17:33

本文关键词： 面神经中间神经小脑前下动脉乙状窦后-内耳道上入路　出处：《郑州大学》2006年硕士论文　论文类型：学位论文

【摘要】：本研究旨在了解桥小脑角的显微解剖；探讨枕下乙状窦后入路及乙状窦后-内耳道上入路的优缺点。本实验采用15例(30侧)干标本和10例(20侧)湿标本，按照枕下乙状窦后入路和乙状窦后-内耳道上入路的所涉及的解剖区域，解剖观测面神经、中间神经、小脑前下动脉及岩静脉等诸多结构，并对神经外科手术乙状窦后入路及乙状窦后。内耳道上入路作初步探讨，主要实验结果如下： 1．面神经桥小脑角池段长为11.13士1.35mm，内耳道段长为10.69±0.90mm。面神经在桥延沟的外端起自脑干，与其外侧的前庭蜗神经进入脑干处相距2.38+0.65mm，距外侧展神经6.62±0.41mm，距三叉神经7.59±1.08mm。由交汇角内前方沿岩骨探查32mm，即可发现面听神经。 2．中间神经单根束居多，共12侧，，两根束6侧，三根束2侧。未见四根束。中间神经前庭部长为7.62±0.69mm，中间部长为10.05±1.12mm。 3．小脑前下动脉小脑前下动脉(AICA)出现率为100％,20侧共23支，单干18侧，双干1侧，三干1侧，未见缺失。20支起自基底动脉(BA)下段，2支起自BA中段，1支起自BA上段。副小脑前下动脉共出现3支，主要分支有迷路动脉、回返穿通动脉、弓状下动脉。 4．10例(20侧)标本共有27支岩静脉，6侧中存在有2～3支岩静脉。岩静脉在脑桥小脑角内各属支的汇合点至岩上窦入口处的距离为3.46±1.87mm。岩静脉在注入岩上窦入口处的压扁外径为2.26±0.82mm。可在前庭蜗神经正上方71mm
[Abstract]:The purpose of this study was to investigate the microanatomy of the cerebellopontine angle, and to explore the advantages and disadvantages of the retrosigmoid sinus approach and the retrosigmoid approach to the inner ear. 15 cases (30 sides) of dry specimens and 10 cases (20 sides) of wet specimens were used. According to the anatomical regions involved in the retrosigmoid suboccipital approach and the retrosigmoid approach and the superior approach to the internal auditory canal, the structures of the facial nerve, the intermediate nerve, the anterior inferior cerebellar artery and the petrosal vein were anatomically observed. The retrosigmoid approach, retrosigmoid sinus approach and suprasigmoid approach were discussed. The main results were as follows:. 1. The length of cerebellopontine cistern was 11.13 卤1.35 mm, and the length of internal auditory canal was 10.69 卤0.90 mm. The distance from the lateral vestibulocochlear nerve to the brainstem was 2.38 0.65 mm, 6.62 卤0.41 mm from the lateral abductor nerve and 7.59 卤1.08 mm from the trigeminal nerve. 2. There were 12, 6 and 2 bundles of the medial nerve, respectively. There were no four bundles. The vestibular part of the medial nerve was 7.62 卤0.69 mm, and the middle part was 10.05 卤1.12 mm. 3. The occurrence rate of AICA in 20 sides of anterior inferior cerebellar artery (AICA) was 100 and 20, 18 in single trunk, 1 in double trunk and 1 in third trunk. No missing .20 was found in the inferior segment of the basilar artery (BAA) and 2 branches in the middle segment of BA and 1 branch in the upper segment of BA. There were 3 branches of the anterior inferior accessory cerebellar artery, the labyrinthine artery, the return perforating artery, and the arcuate inferior artery. 4. There were 27 petrosal veins in 20 sides of 10 cases. The distance between the confluence of petrosal veins in the cerebellopontine angle and the entrance of the superior petrosal sinus was 3.46 卤1.87 mm. the petrosal vein was compressed at the entrance of the superior petrosal sinus. The outer diameter was 2.26 卤0.82mm. it was 71mm above the vestibulocochlear nerve.
【学位授予单位】：郑州大学
【学位级别】：硕士
【学位授予年份】：2006
【分类号】：R322

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