Anterior spinal artery
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| Artery: Anterior spinal artery | |
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| Arteries of the brain, brain stem and upper spinal cord (anterior spinal artery at bottom) | |
| Latin | arteria spinalis anterior |
| Gray's | subject #148 |
| Source | vertebral arteries |
| Vein | anterior spinal veins |
| Dorlands / Elsevier | a_61/12156004 |
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Overview
In human anatomy, the anterior spinal artery is the blood vessel that supplies the anterior portion of the spinal cord. It arises from branches of the vertebral arteries and is supplied by the anterior segmental medullary arteries, including the artery of Adamkiewicz, and courses along the anterior aspect of the spinal cord.
The anterior spinal artery is a small branch, which arises near the termination of the vertebral, and, descending in front of the medulla oblongata, unites with its fellow of the opposite side at the level of the foramen magnum.
One of these vessels is usually larger than the other, but occasionally they are about equal in size.
The single trunk, thus formed, descends on the front of the medulla spinalis, and is reinforced by a succession of small branches which enter the vertebral canal through the intervertebral foramina; these branches are derived from the vertebral and the ascending cervical of the inferior thyroid in the neck; from the intercostals in the thorax; and from the lumbar, iliolumbar artery and lateral sacral arteries in the abdomen and pelvis.
They unite, by means of ascending and descending branches, to form a single anterior median artery, which extend as far as the lower part of the medulla spinalis, and is continued as a slender twig on the filum terminale.
This vessel is placed in the pia mater along the anterior median fissure; it supplies that membrane, and the substance of the medulla spinalis, and sends off branches at its lower part to be distributed to the cauda equina.
Disorders
Disruption of the anterior spinal cord leads to bilateral disruption of the corticospinal tract, causing motor deficits, and bilateral disruption of the spinothalamic tract, causing sensory deficits in the form of pain/temperature sense loss. See also Medial medullary syndrome
See also
Additional images
 The arteries of the base of the brain. |
External links
- Yoshioka K, Niinuma H, Ohira A, Nasu K, Kawakami T, Sasaki M, Kawazoe K. MR angiography and CT angiography of the artery of Adamkiewicz: noninvasive preoperative assessment of thoracoabdominal aortic aneurysm. Radiographics. 2003 Sep-Oct;23(5):1215-25. PMID 12975511 Full Text
- Drawing of the anterior spinal artery
- Horizontal view of blood supply to the spinal cord
- Roche Lexicon - illustrated navigator, at Elsevier 13048.000-1
- Diagram at nih.gov
This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.
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Acknowledgement and Attribution Regarding Sources of Content
Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .
