Results:(1)The geniculate ganglion (GG) was in the layer of lateral semicircular canal .

结果：（1）面神经膝状神经节（GG）多位于外半规管层面。

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There are much more small Spaces between the stapes and the structures especially facial nerve and the lateral semicircular canal around it.

镫骨与周围重要结构之间的空间狭小，尤其是与面神经、水平半规管距离小。

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Short limb of incus(or incudal fossa) and lateral semicircular canal are important landmarks by which pyramidal segment of FN might be located in manipulation of mastoid.

砧骨短脚或砧骨窝及外半规管是乳突手术中确定FN锥曲段的重要标志。

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