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作者们收集10例因小脑桥脑角肿瘤手术损伤面神经颅内段的患者,其中2例切断,8例神经变细或受到牵拉,均有永久性面瘫,分别在17天到4年的时间内进行舌下-面神经(其中一例为面-副神经)吻合术时,截取从茎乳孔到膝状节远端的鼓室段面神经进行光学显微镜及电镜检查。在面神经横断面切片上,能看到两个不同的区域:靠近周边的一个小范围内,有鞘神经纤维的数目近似正常;而另一个区域内,神经纤维的数目明显减少。这两个区域之间有一过渡区,正常区相当于动物实验时观察到的面神经的中间神经部位,系非运动神经纤维,约有2500根,其直径平均为2.4μm。
The authors collected 10 patients with intracranial facial nerve injury due to cerebellar pontine angle tumor surgery, of which 2 cases were severed, 8 cases were narrowed or pulled, and all had permanent facial paralysis. The time was from 17 days to 4 years. When the sublingual-facial nerve (one of which is the facial-subarachnoid) anastomosis was performed intraoperatively, the tympanic facial nerve from the stylomal foramen to the distal geniculate ganglion was taken for light microscopy and electron microscopy. In the cross section of the facial nerve, two different regions can be seen: in a small area near the periphery, the number of sheath nerve fibers is approximately normal, while in the other region, the number of nerve fibers is significantly reduced. There is a transition zone between the two regions. The normal zone is equivalent to the intervening nerve parts of the facial nerve observed during animal experiments. It is non-motor nerve fibers and has about 2,500 roots. Its average diameter is 2.4 μm.