title: Persistent proatlantal artery.
abstract: A case of persistent proatlantal artery is described and the developmental anatomy reviewed. This vessel, arising from the internal carotid artery in the neck, is liable to be confused with the hypoglossal artery, but unlike the latter it forms the vertebral artery outside the skull and enters through the foramen magnum.
mesh_terms: D001269:Atlanto-Occipital Joint / Q000098:blood supply; D002339:Carotid Arteries / Q000000981:diagnostic imaging; D002533:Cerebral Angiography; D002536:Cerebral Arteries / Q000002:abnormalities* / Q000033:anatomy & histology; D000013:Congenital Abnormalities / Q000000981:diagnostic imaging; D006801:Humans; D008297:Male; D008875:Middle Aged; D014711:Vertebral Artery / Q000033:anatomy & histology