Result IPS courses in the sulcus for inferior petrosal sinus,that was,on the intracranial surface of the petroclival fissure which was made up of the clivus and the petrous pyramid.

• 结果IPS行于颅底内面的岩下窦沟内,即由斜坡和颞骨岩部组成的岩斜裂内,形状不规则。