Posterior spinal arteries

The posterior spinal arteries are a pair of arteries that supply the respective ipsilateral grey and white posterior columns of the spinal cord.

Gross anatomy

The posterior spinal arteries arise from either the posterior inferior cerebellar or vertebral arteries (V3 or V4 segments) and runs the entire posterolateral aspect of the spinal cord. Its origin may be intra-dural or extra-dural 1,2.

It anastomoses with its fellow and with the anterior spinal artery. They are reinforced by segmental/radicular branches along its course, the largest being the artery of Adamkiewicz 1-3.

Spinal anatomy
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Article information

rID: 29103
Section: Anatomy
Tag: stub
Synonyms or Alternate Spellings:
  • Posterior spinal artery

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Cases and figures

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    Figure 3: spinal cord arterial supply
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