Arterial Supply to the Nerves of the Oculomotor System

• Thalamoperforating arteries (PCA and PCOMM)/SCA/BA/collicular artery
• Mesencephalic and diencephalic perforators (PCA)/inferolateral and

meningohypophyseal trunk (ICA) ICA/OA Trochlear nerve Vermian, paravermian (SCA)/collicular artery (PCA)/inferolateral and meningohypophyseal trunk (ICA) ICA/posterior ethmoidal artery (ICA)/OA Abducens nerve Anterolateral arteries, pontomedullary artery, anterior inferior cerebellar artery (BA)/inferolateral and meningohypophyseal trunk (ICA) ICA/mOA ICA, internal carotid artery; ECA, external carotid artery; ACA, anterior cerebral artery; MCA, middle cerebral artery; PCA, posterior cerebral artery; ACOMM, anterior communicating artery; PCOMM, posterior communicating artery; OA, ophthalmic artery; BA, basilar artery; SCA, superior cerebellar artery; VA, vertebral artery; CCA, common carotid artery.