Infarction of this artery due to thrombosis or stroke leads to PICA syndrome, a neurological disease with characteristic, stereotyped symptoms. Lateral medullary syndrome (LMS), also called Wallenberg syndrome or posterior inferior cerebellar artery syndrome results from a vascular event in the lateral part of the medulla oblongata. PICA supplies the lateral medulla, the inferior cerebellum, and the inferior cerebellar peduncle. Perhaps the most important thing to recognize about the brainstems blood supply is just. The medial branch is continued backward to the notch between the two hemispheres of the cerebellum while the lateral supplies the under surface of the cerebellum, as far as its lateral border, where it anastomoses with the anterior inferior cerebellar and the superior cerebellar branches of the basilar artery.īranches from this artery supply the choroid plexus of the fourth ventricle. The vertebral and basilar arteries supply the brainstem and cerebellum. The two arteries originate from the distal end of the basilar artery, where it bifurcates into the left and right posterior cerebral arteries. It winds backward around the upper part of the medulla oblongata, passing between the origins of the vagus and accessory nerves, over the inferior peduncle to the under surface of the cerebellum, where it divides into two branches. These branches supply the medulla oblongata (in blue) and the pons (in green). The posterior cerebral artery ( PCA) is one of a pair of cerebral arteries that supply oxygenated blood to the occipital lobe, part of the back of the human brain. The posterior inferior cerebellar artery (PICA), the largest branch of the vertebral, is one of the three main arterial blood supplies for the cerebellum. Arterial supply to brain:Cerebellar arteries (SCA, AICA, PICA) arise from the lateral (marginal) branch and from the SCA distal to the origin of the lateral.
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