Canal of vertebral artery of atlas.
D001270:Cervical Atlas / Q000098:blood supply* / Q000000981:diagnostic imaging; D006801:Humans; D007511:Ischemia / Q000209:etiology; D011859:Radiography; D013115:Spinal Canal / Q000002:abnormalities / Q000098:blood supply* / Q000000981:diagnostic imaging; D014711:Vertebral Artery / Q000033:anatomy & histology* / Q000000981:diagnostic imaging