![]() Severe occlusion of this artery or to vertebral arteries could lead to Horner's Syndrome as well. This area corresponds to the vestibular portion of the cerebellum and is exclusively supplied by medial PICA. The posterior inferior cerebellar artery (PICA) is defined as the artery that supplies the. 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. Also, the literature concerning the PICA is reviewed. Typically, the PICA may supply: posteroinferior. Follow this artery as it courses up to the. It is the most variable cerebral artery and has a variable territory depending on the size of the AICA. The superior cerebellar artery earns a distinction in being the most constantly identified vessel arising from the basilar, probably because its territory does not lend itself to the same degree of plasticity (with respect to arterial supply) as do those of AICA and PICA. 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. In its course along the medulla it gives off small branches to supply posterolateral regions of the medulla. 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. ![]() Typically, the PICA may supply: posteroinferior cerebellar hemispheres (up to the great horizontal fissure) : cerebellar tonsils, biventral lobule, nucleus gracilis, superior semilunar lobule, inferior portion of the vermis lower part of the medulla Stroke pattern:Common type of cerebellar. Blockage of the posterior inferior cerebellar artery can result in a type of stroke called lateral medullary syndrome. It is the most variable cerebral artery and has a variable territory depending on the size of the AICA. ![]() It is one of the three main arteries that supply blood to the cerebellum, a part of the brain. Aneurysms of the posterior inferior cerebellar artery (PICA) are very rare, only 0. The posterior inferior cerebellar artery ( PICA) is the largest branch of the vertebral artery. 1 Citations Abstract Posterior circulation aneurysms account for approximately 10 of all aneurysms, which affect 16 of the population 1, 2. ![]()
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