title: Distribution of arteries from brain stem to inner ear around the internal auditory canal.
abstract: In the present work, casts of vessels surrounding the internal auditory canal of the guinea pig were subjected to scanning electron microscopic examination. Most casts were prepared by the resin-casting method using Mercox resin. The following results were obtained: 1) Individual variations and bilateral asymmetry were observed in the anterior inferior cerebellar artery (AICA), which branches off the basilar artery (BA); 2) Frequently a loop the AICA was found in the CP-angle and internal auditory canal; 3) The internal auditory artery (IAA) did not always originate in AICA but sometimes arose directly from BA; 4) In common cochlear artery and anterior vestibular artery, there were individual differences and asymmetric branching patterns on both sides; 5) We conclude that inner ear disease of vascular origin may be influenced by individual variations in the BA and its branches.
authors.affiliation: Department of Otolaryngology, Osaka City University Medical School, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Sugita
authors.forename: H
authors.initials: H
authors.lastname: Masutani
authors.forename: M
authors.initials: M
authors.lastname: Moriguchi
authors.forename: K
authors.initials: K
authors.lastname: Matsunaga
authors.forename: Y
authors.initials: Y
authors.lastname: Nakai
mesh_terms: D000818:Animals; D001158:Arteries / Q000033:anatomy & histology; D001488:Basilar Artery / Q000033:anatomy & histology*; D001933:Brain Stem / Q000098:blood supply*; D002531:Cerebellum / Q000098:blood supply*; D016319:Corrosion Casting; D007758:Ear, Inner / Q000098:blood supply*; D006168:Guinea Pigs; D008855:Microscopy, Electron, Scanning