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根据Dandy于1934年的首次报告和晚近Jannetta的观察结果,可将第5和第7脑神经与血管间的异常接触看作三叉神经痛和单侧面肌抽搐的病因。用常规方法不能查明原因的第8脑神经功能障碍,它表现为某些形式的眩晕、耳鸣和内耳性难听,显然亦应考虑到同样的血管机械性原因。角池空气造影的新的C T检查技术可显示桥小脑角和内耳道的神经和血管。本文拟对该方法在诊断异常神经-血管关系中的价值进行讨论。面神经和前庭-耳蜗神经从脑干出发,行经桥小脑角池,在它们共同到达内耳道底和向其深部行走之前,最常与血管接触的部位是在它们与小脑下前动脉的交叉处,该动脉向岩骨分出前庭动脉和弓下动脉,所有上述动脉和该部位的粗大静脉的供血方式常有很大变异,可能呈环状向深部伸入内耳道。显微镜下,神经的所谓“入根段
According to Dandy’s first report in 1934 and late Jannetta observations, aberrant contact between the 5th and 7th cranial nerves and blood vessels may be considered as the cause of trigeminal neuralgia and unilateral muscle spasms. The 8th cranial nerve dysfunction, which can not be identified by conventional methods, manifests itself in some forms of dizziness, tinnitus, and obstruction of the inner ear, apparently taking into account the same vascular mechanical causes. Angular pool air imaging of the new C T examination can display the cerebellopontine angle and internal auditory canal nerves and blood vessels. This article intends to discuss the value of this method in the diagnosis of abnormal neurovascular relations. Facial and Cortical-Cochlear Nerves Proceeding from the brainstem, passing through the cerebellopontine angle pool, the sites most commonly in contact with the blood vessels at their intersections with the anterior cerebellar artery, before they reach the bottom of the internal auditory meatus and travel deep into it, The artery separates the vestibular arteries and the arch arteries from the petrous bone. The blood supply to all the arteries and the large veins of the site often varies greatly and may extend annularly into the inner ear canal. Under the microscope, the so-called nerve into the root section