title: Teaching NeuroImages: occlusion of all 4 major extracranial vessels.
authors.affiliation: Department of Neurology, Hospital of the University of Pennsylvania, 3400 Spruce St., Philadelphia, PA 19104, USA.
authors.forename: Michael T
authors.initials: MT
authors.lastname: Mullen
authors.forename: Alexander
authors.initials: A
authors.lastname: Pantelyat
authors.forename: Bryan A
authors.initials: BA
authors.lastname: Pukenas
authors.forename: Steven R
authors.initials: SR
authors.lastname: Messé
mesh_terms: D000368:Aged; D002343:Carotid Artery, Internal / Q000473:pathology*; D002560:Cerebrovascular Circulation; D003097:Collateral Circulation; D006801:Humans; D020765:Intracranial Arterial Diseases / Q000473:pathology*; D018810:Magnetic Resonance Angiography; D008297:Male; D013575:Syncope / Q000473:pathology*; D014711:Vertebral Artery / Q000473:pathology*