回返穿通动脉与面听神经关系的解剖学研究

An anatomic study on the relationship of the recurrent perforating artery and the facial nerve and the vestibulocochlear nerve

目的 :介绍回返穿通动脉 (RPA)与面 听神经的关系 ,为桥小脑角 (CPA)的前庭 耳蜗神经 (VN)血管减压术提供有实用价值的解剖学资料。方法 :测量 2 0具经甲醛固定的成人尸颅 ,观察CPA内与面、听神经有关的RPA的解剖结构 ,重点是与VN间的位置关系。结果 :RPA出现率为 10 0 % ,发出 1个分支的有 30侧(75 .0 % ) ,2个分支的有 10侧 (2 5 .0 % ) ;位于面神经 (FN)、VN之间有 32侧 (80 .0 % ) ,其中 87.5 %位于FN中外2 / 3。VN的血管接触率为 95 % ,有 2支或 2支以上血管与VN接触的有 2 0侧 (5 0 .0 % )。结论 :了解、熟悉RPA与面 听神经的关系 。

Objective:To privde useful anatomic data for the microvascular decompression surgery of the vestibulocochlear nerve in the cerebellopontine angle.Method:The recurrent perforating artery related with VN in the cerebellopontine angle were examined with operating microscope in 20 adult head cadavers fixed with formalin.Result:The recurrent perforating artery was identified in 40 specimens with cerebellopontine angles. There was one recurrent perforating artery in 30 cerebellopontine angles and two in 10.In thirty-two (80%) the recurrent perforating arteries passed between the facial nerve and the vestibulocochlear nerve. In the thirty-two cerebellopontine angles, some recurrent perforating arteries ( 87.5%) were located in the external two-third part of the facial nerve and vestibulocochlear nerve in the cerebellopontine angle.In thirty-eight (95%) the vestibulocochlear nerves had contact with the anterior inferior cerebellar artery or its branches. Among them, twenty (50%) had two or more branches contacted with the vestibulocochlear nerves.Conclusion:These data may be helpful in the microvascular decompression surgery of the vestibulocochlear nerve, and in the radiography of cerebellopontine angle.