Posterior spinal artery

Posterior Spinal Artery

File:Gray's Anatomy plate 518.png

The posterior spinal artery is shown in this illustration from Gray's Anatomy.

The Posterior Spinal Artery (PSA) is a significant blood vessel in the human anatomy that supplies the posterior one-third of the spinal cord. It originates from the vertebral artery or the posterior inferior cerebellar artery.

Anatomy

The posterior spinal artery is a paired artery, with one artery present on each side of the spinal cord. It runs along the posterior aspect of the spinal cord, supplying the posterior columns and the dorsal aspect of the lateral columns.

Clinical Significance

A blockage or ischemia in the posterior spinal artery can lead to a condition known as Posterior spinal artery syndrome, which is characterized by loss of proprioception and vibratory sense.

See Also

• Anterior spinal artery
• Spinal cord
• Vertebral artery
• Posterior inferior cerebellar artery

External Links

• Posterior Spinal Artery at medicalook.com

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