来自基底动脉(basilar artery)或小脑下后动脉,小脑下前动脉的迷路动脉(labyrinth ar tery)及耳后动脉(retroauricular artery)的茎乳动脉(stylomastoid artery)。迷路动脉亦称内听动脉(inner auditory artery),伴位听神经至内耳,分出三支:即蜗支(cochlear branch)、前庭支(vestibular branch)和前庭蜗支(vestibulocochlear branch)。前庭支供应椭圆囊、球囊、前半规管及 ......