The anterior and posterior radicular arteries are arteries of varying size that enter an intervertebral foramen to provide arterial supply to the posterior and anterior roots of a spinal nerve as well as the sensory ganglion.[1]

At the level of the lumbosacral enlargement, a relatively large radicular artery (the great radicular artery) that reaches the spinal cord often present.[1]

Relationship with segmental medullary arteries

In the thoracolumbar region, most segmental medullary arteries regress during early development to form radicular arteries; those that persist give off radicular arteries as branches.[1] Radicular arteries can sometimes be functionally replaced by segmental medullary arteries. However, unlike those arteries, radicular arteries do not form anastamoses with the anterior or posterior spinal arteries. Radicular arteries are also generally smaller. The so-called great radicular artery it is in fact a segmental medullary artery.[2]

References

  1. 1 2 3 Waschke, Jens; Böckers, Tobias M.; Paulsen, Friedrich; Arnold, Wolfgang; Bechmann, Ingo, eds. (2018). Sobotta Anatomy Textbook: English Edition with Latin Nomenclature (1st ed.). München: Elsevier. p. 623. ISBN 978-0-7020-6760-0.
  2. ↑ Moore, Keith; Anne Agur (2007). Essential Clinical Anatomy, Third Edition. Lippincott Williams & Wilkins. p. 298. ISBN 978-0-7817-6274-8.
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