posterior spinal arteries

posterior spinal arteries

one of two arteries that originate in the cranial cavity, usually arising directly from a terminal branch of each vertebral artery, and descend along the spinal cord, each as two branches that bracket the posterolateral sulcus and the connection of posterior roots with the spinal cord. They are reinforced along their length by 8 to 10 segmental medullary arteries, the largest of which is the artery of Adamkiewicz.
References in periodicals archive ?
The posterior spinal arteries occasionally originate from the posterior inferior cerebellar artery.
The less significant posterior spinal arteries arise from the cerebral circulation, most notably the posterior inferior cerebellar arteries, as branches from the vertebral arteries.
The anterior and posterior spinal arteries supply blood to the spinal cord.

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