面神经和前庭蜗神经断层解剖与MRI

Sectional Anatomy and MRI of Facial and Vestibulocochlear Nerves

目的：探讨面神经及前庭蜗神经颅内段、内耳道段的断层解剖学特征，为相关疾病的影像学诊断和外科治疗提供解剖学依据。方法：在69例成人尸体头部的连续断层标本（横断层标本36例、冠状断层标本15例、矢状断层标本18例）上分别探讨面神经、前庭蜗神经颅内段及内耳道段在断面上的走行规律及毗邻关系，并与10例活体成人头部MR扫描图像的相应层面进行对照分析。结果：面神经与前庭蜗神经自发出后相互伴行向外水平走行，穿过脑桥小脑角池后进人内耳道；内耳道是断面上识别面神经与前庭蜗神经的重要标志性结构，小脑绒球在横断层上也有助于对二者的识别。结论：横断面及冠状断面均可清晰显示面神经及前庭蜗神经颅内段，矢状断面则对二者在内耳道内走行的显示最佳。

Objective：To study the sectional anatomic feature of intracranial and meatal segments of fa cial and vestibulocochlear nerves in order to provide anatomic basis for the imaging diagnosis and clinical sur geon of the related lesions. Methods：The travel regularity and adjacent relationship of intracranial and meatal segments of facial and vestibulocochlear nerves were explored on head sections of 69 adult specimens （ axial 36, coronal 15 and sagittal 18 ） , and were compared with MRI from 10 alive healthy adults. Results：Accompanying with each other, facial and vestibulocochlear nerves crossed the cerebellopontine angle cistem laterally and hori zontally, and arrived in the internal auditory canal. The internal auditory canal was an important indicatory mark for the identification of facial and vestibulocochlear nerves, and the flocculonodule was also useful for their identification in transverse sections. Conclusions ： Both of transverse and coronal sections can clearly display in tracranial segment of facial and vestibulocochlear nerves, and sagittal sections can display their meatal segment well.