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目的探讨听神经瘤涉及的面神经段显微解剖,为听神经瘤手术提供解剖学数据。方法采用10%甲醛溶液充分固定的成人尸头标本15例,对面神经的脑干端、桥小脑角段、内耳道段及其毗邻结构进行测量和拍摄。结果面神经脑干端与周围解剖结构有恒定距离;桥小脑角段由面神经运动根、中间神经组成,与前庭蜗神经走行关系恒定;内耳道段面神经运动根在位听神经前上方,中间神经和面神经运动根在内耳道中部合成一干,面神经在内耳道底的横嵴上垂直嵴前走行;迷路段是面神经在颞骨内最短、最细的部分。结论研究听神经瘤涉及的面神经段显微解剖,有助于听神经瘤的切除,保护面神经。
Objective To investigate the microsurgical anatomy of facial nerve involved in acoustic neuroma and to provide anatomical data for acoustic neuroma surgery. Methods Fifteen adult cadaver specimens were fixed in 10% formaldehyde solution. The brainstem, the cerebellopontine angle, the inner auditory canal and their adjacent structures of the facial nerve were measured and photographed. Results There was a constant distance between the brainstem of the facial nerve and the surrounding anatomical structure. The angle of the cerebellopontine was composed of the motor nerve root and the intermedia nerve, and had a constant relationship with the vestibular cochlear nerve. The medullary motor nerve root located above the anterior superior auditory nerve, medial nerve and facial nerve Motor roots in the middle part of the synthesis of a dry ear, facial nerve at the bottom of the ridge on the ridge perpendicular to the vertical crista walking; lost section of the facial nerve in the temporal bone the shortest and most thin part. Conclusions The study of the facial nerve segment involved in acoustic neuroma microsurgical dissection, help excision of acoustic neuroma, facial nerve protection.