The retro-articular vertebral artery ring of the atlas and its significance.
D000293:Adolescent; D001161:Arteriosclerosis / Q000209:etiology / Q000473:pathology; D001270:Cervical Atlas / Q000473:pathology*; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008297:Male; D009999:Ossification, Heterotopic / Q000150:complications / Q000473:pathology*; D013122:Spinal Diseases / Q000209:etiology / Q000473:pathology; D014652:Vascular Diseases / Q000209:etiology; D014711:Vertebral Artery