The posterior inferior cerebellar artery (PICA) is defined as the artery that supplies the. Severe occlusion of this artery or to vertebral arteries could lead to Horner's Syndrome as well. Also, the literature concerning the PICA is reviewed. The cortical branches of the MCA (depicted in red in the diagrams) supply the lateral surface of the hemisphere, except for the medial part of the frontal and the parietal lobe, which is supplied by the ACA, and the inferior part of the temporal lobe, which is supplied by the PCA. In general, proximal branches of PICA supply brain stem and longer circumferential branches supply the cerebellum. The medial branch continues 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.Ī disrupted blood supply to posterior inferior cerebellar artery due to a thrombus or embolus can result in a stroke and lead to lateral medullary syndrome. It winds backward around the upper part of the medulla oblongata, passing between the origins of the vagus nerve and the accessory nerve, over the inferior cerebellar peduncle to the undersurface of the cerebellum, where it divides into two branches. The PICA supplies blood to the medulla oblongata the choroid plexus and tela choroidea of the fourth ventricle the tonsils the inferior vermis, and the inferior parts of the cerebellum. Blockage of the posterior inferior cerebellar artery can result in a type of stroke called lateral medullary syndrome. Approximately 1-2cm before the vertebral arteries join they give rise to the posterior inferior cerebellar arteries (PICA). We aimed to investigate the clinical significance of this cerebrovascular variant. 4: Radicular (or segmental medullary) vein. A vertebral artery (VA) terminating in a posterior inferior cerebellar artery (PICA) is often considered to be a normal variation associated with VA hypoplasia. (Posterior spinal artery is not labeled, but region is visible.) 1: Posterior spinal vein. It is one of the three main arteries that supply blood to the cerebellum, a part of the brain. The distal segments and branches of PICA supply tonsil, vermis, and posteroinferior cerebellar hemisphere approximately to the level of the primary (horizontal). The three major arteries of the cerebellum: the SCA, AICA, and PICA. The posterior inferior cerebellar artery ( PICA) is the largest branch of the vertebral artery.
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