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顿中窝进路可处理内听道和膝状神经节病变，同时保存听力。面神经迷路段靠近耳蜗底转并途经颅中窝底板下方，颅中窝进路时需分离该段。为确定面神经迷路段到耳蜗底转的距离，对24例（48耳）6岁～76岁的人体颧骨标本进行形态学测量，均无面神经和耳部疾患史及耳手术史，听力测试
The midwestern approach treats lesions of the internal auditory and geniculate ganglia while preserving hearing. Facial nerve lost near the bottom of the cochlear stagnation and through the bottom of the skull midfielder, cranial fossa into the road to be separated when the segment. In order to determine the distance from the locomotor pathway to cochlea, 24 cases (48 ears) of 6 ~ 76 year-old human cheekbones were examined morphologically without any history of facial and ear diseases and ear surgery.