Posterior inferior cerebellar artery

Posterior inferior cerebellar artery

Infobox Artery
Name = PAGENAME
Latin = arteria cerebelli inferior posterior
GraySubject = 148
GrayPage = 580
Width = 250


Caption = The three major arteries of the cerebellum: the SCA, AICA, and PICA. (Posterior inferior cerebellar artery is PICA.)
Width2 = 335



Caption2= Diagram of the arterial circulation at the base of the brain. (PICA is labeled at bottom right.)
BranchFrom = vertebral artery
BranchTo = medial branch
lateral
Vein = inferior cerebellar veins
Supplies = cerebellum, choroid plexus of the fourth ventricle
MeshName =
MeshNumber =
DorlandsPre = a_61
DorlandsSuf = 12154613
The posterior inferior cerebellar artery (PICA), the largest branch of the vertebral, is one of the three main arterial blood supplies for the cerebellum.

Course

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.

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.

Branches from this artery supply the choroid plexus of the fourth ventricle.

Diseases

Infarction of this artery due to thrombosis or stroke leads to PICA syndrome, a neurological disease with characteristic, stereotyped symptoms.

External links

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