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arteries arising from the segmental spinal arteries at every vertebral level. They supply the anterior and posterior roots of the spine.
Any of the arteries that are branches of the vertebral, deep cervical, ascending cervical, inferior thyroid, posterior intercostal, lumbar, or lateral sacral arteries and that enter the vertebral canal through the intervertebral foramina to divide and then to join the posterior and anterior spinal arteries.
See also: artery