Vascular Variation around the Internal Acoustic Meatus

Abstract

Many kinds of studies of inner ear vessels have made before. We studied the relation between vascular variation around the internal acoustic meatus and the facial, vestibular and cochlear nerve with casting method using Mercox resin and microfil rubber. Arterial loops of all guinea pigs were observed similarly to human cerebellar loops, which didn't originated from the anterior inferior cerebellar artery but from the common cochlear artery. No loop observed within the internal acoustic meatus on all guinea pigs different from human cerebellar loops. The subarcuate artery of the guinea pig originated from the internal auditory artery, and vasculized paraflocculus of the cerebellum.