title: Rotational occlusion of the vertebral artery at the atlantoaxial joint: is it truly physiological?
abstract: We present a patient with vertebrobasilar insufficiency, with vertigo and horizontal nystagmus, induced by turning the head to the right. Angiography demonstrated transient occlusion of the left vertebral artery at the atlantoaxial joint during rotation of the head. The pathogenesis and angiographic findings are discussed.
authors.affiliation: Department of Neurosurgery, Iwamizawa Municipal General Hospital, Hokkaido, Japan.
authors.forename: I
authors.initials: I
authors.lastname: Takahashi
authors.forename: S
authors.initials: S
authors.lastname: Kaneko
authors.forename: K
authors.initials: K
authors.lastname: Asaoka
authors.forename: T
authors.initials: T
authors.lastname: Harada
mesh_terms: D000368:Aged; D001269:Atlanto-Occipital Joint / Q000098:blood supply* / Q000601:surgery; D002533:Cerebral Angiography; D003251:Constriction, Pathologic; D005260:Female; D006801:Humans; D009949:Orientation / Q000502:physiology; D011183:Postoperative Complications / Q000000981:diagnostic imaging; D016059:Range of Motion, Articular / Q000502:physiology*; D012399:Rotation; D014711:Vertebral Artery / Q000000981:diagnostic imaging / Q000601:surgery; D014715:Vertebrobasilar Insufficiency / Q000000981:diagnostic imaging* / Q000601:surgery