于岩骨深部,由耳蜗基底回贯穿至岩骨下面颈内静脉窝前部,沟通于外淋巴与蜘蛛膜下腔之狭窄管道为耳蜗导水管。人类耳蜗导水管由胚胎时期的前软骨(Pre-cartilage)经退行性变而发生,管腔内为脑膜之蜘蛛膜层延续部分,镜下为格样(latlice work)结缔组织,称为耳周管(Periotic duct)(Bast & In the deep part of the petrous bone, the cochlea basal gyri goes through to the anterior part of the internal jugular fossa under the petrous bone, and the narrow tube communicating with the perilymph and the subarachnoid space is the cochlear aqueduct. Human cochlear aqueduct from the embryonic period before the cartilage (Pre-cartilage) degenerative changes occur within the lumen of the brain for the continuation of the portion of the arachnoid layer, the microscope for Lattice work (connective tissue), known as the ear Periotic duct (Bast &