Anomalous origin of Vertebral Artery

(click on the image to enlarge)

 

                          (Netter)                                                        (Am J Neuroradiol 1998;20:1318-1321)

Netter diagram: Top - Normal, Middle - "Bovine" arch (common origin for innominate and LCC arteries) and Botton - Right vertebral artery from innominate artery & Left vertebral artery from aortic arch.

AJNR cartoon: Possible anomalous vertebral artery origins