Posterior inferior cerebellar artery

Posterior Inferior Cerebellar Artery

File:Gray's Anatomy plate 516 brain.png

Posterior Inferior Cerebellar Artery as seen in Gray's Anatomy

The Posterior Inferior Cerebellar Artery (PICA) is one of the three main arteries that supply blood to the cerebellum. It is a branch of the vertebral artery and is the largest branch of this artery.

Anatomy

The PICA originates from the vertebral artery, typically from the proximal or distal segment. It then courses posteriorly and inferiorly to supply the posterior and inferior portions of the cerebellum. The PICA also gives off several branches that supply the medulla oblongata and the choroid plexus of the fourth ventricle.

Clinical significance

The PICA is clinically significant as it is often involved in strokes, specifically lateral medullary (or Wallenberg) syndrome. This is due to its supply to the medulla oblongata and the cerebellum.

See also

• Anterior inferior cerebellar artery
• Superior cerebellar artery
• Vertebral artery
• Circle of Willis

References

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