Fig. 1

Vessel modification and hemodynamic changes. a Baseline, right common carotid artery (CCA). b Decrease in blood flow in the external carotid artery (ECA) and increase in the ascending pharyngeal artery (APA) following partial embolization of ECA branches. CC common carotid artery, O occipital artery, EC external carotid artery, AP ascending pharyngeal artery. Branches of the external ethmoidal artery, (EE): MM middle meningeal artery, RA ramus anastomoticus, AA arteria anastomotica, IM internal maxillary artery, C ciliary artery. Intracranial anatomy: PC posterior cerebral artery, BA basilar artery, CW circle of Willis, MC middle cerebral artery, AC anterior cerebral artery