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作者们在给Bell氏面瘫病人作面神经颞骨内全程面神经管手术的同时作了面神经的形态学和组织学测量的研究,发现面神经骨管最狭窄的部位是内耳道底面神经骨管入口处,作者们称之为内耳道孔(meatal foramen)。〔请参阅本刊6(3):192,文摘号273,1982〕在此孔的内耳道一侧的面神经直径为1～1.2mm,而耳道孔骨峡部的直径平均只0.68mm,故面神经势必是被挤压着进入该孔的。在内耳道和膝状神经节之间的迷路段面神经,缺乏神经外膜和神经外周组织,神经内膜和蛛网膜组织也很少,故在神经受牵张或受挤压时,此处神经容易受损害。Lang(1981)和Ge&Spector(1981)也都从解剖学观
The authors made morphological and histological measurements of the facial nerve at the same time as giving full facial nerve tube surgery to patients with facial paralysis in Bell’s Facial Paralysis and found that the narrowest area of the facial nerve tube was the entrance of the basal nerve of the internal auditory canal. They call it meatal foramen. [See Journal 6 (3): 192, Abstract No. 273, 1982) The diameter of the facial nerve on the side of the inner ear canal in this hole is 1 to 1.2 mm, while the diameter of the isthmus of the ear hole is only 0.68 mm on average, so the facial nerve Is bound to be squeezed into the hole. In the internal auditory meatus and geniculate ganglion labyrinthine facial nerve, the lack of epineurium and peripheral nerve tissue, nerve endometrium and arachnoid tissue is also very small, so when the nerve is distracted or squeezed, where nerve Easily damaged. Lang (1981) and Ge & Spector (1981) are also from the anatomy