Results:(1)The geniculate ganglion (GG) was in the layer of lateralsemicircularcanal .
结果：（1）面神经膝状神经节（GG）多位于外半规管层面。
2
There are much more small Spaces between the stapes and the structures especially facial nerve and the lateralsemicircularcanal 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。
3
Short limb of incus(or incudal fossa) and lateralsemicircularcanal are important landmarks by which pyramidal segment of FN might be located in manipulation of mastoid.