Anatomy Atlases(tm) : A digital library of anatomy information

Home | Search | About Us | FAQ | Reviews | Contact Us

Anatomy Atlases: Illustrated Encyclopedia of Human Anatomic Variation: Opus II: Cardiovascular System: Vertebral Artery Variations.

Illustrated Encyclopedia of Human Anatomic Variation: Opus II: Cardiovascular System

Vertebral Artery Variations.

Ronald A. Bergman, PhD
Adel K. Afifi, MD, MS
Ryosuke Miyauchi, MD

Peer Review Status: Internally Peer Reviewed


Image of vertebral artery variations

This study was based on 693 laboratory specimens.

Upper middle and middle left;Usual vascular pattern with vertebral artery arising from upper, posterior surface of subclavian artery 1/2 to 2 cm medial to thyrocervical trunk; 576 of 693 specimens, 83.12%.

Middle right;Vertebral artery displaced more than 2 cm medial to the thyrocervical trunk but still derived from subclavian artery; 58 of 693 specimens, 8.37%; 25 right 33 left.

Middle middle;Vertebral artery arises from subclavian artery lateral to or as common trunk with thyrocervical trunk; 21 of 693 specimens, 3.03%; 17 right, 4 left. In all of these cases, the vertebral artery arose from a common stem with the thyrocervical trunk on the left side. In only 3 of these specimens did the right vertebral arise as a branch of the second portion of the subclavian artery.

Lower left;Left vertebral artery arising as direct branch of aortic arch between left common carotid and left subclavian arteries; 17 of 693 specimens, 2.46%. Right vertebral artery, however, arising at site of bifurcation of innominate artery imto right subclavian and right common carotid arteries; 7 of 693 specimens,1.11%.

Lower middle;Right vertebral artery arising as direct branch of right common carotid artery; 2 of 693 specimens, 0.28 %. Lower right; Dual or accessory vertebral arteries were encountered in 5 of 693 specimens, 0.72%; all were left sided. Three small accessory vertebral arteries arose as direct branches of the aortic arch, and 2 as a branch of the thyrocervical trunk. In all cases, the larger or main vertebral artery arose from the left subclavian artery.

redrawn from Daseler and Anson, 1959.

Section Top | Title Page


Home | Search | About Us | FAQ | Reviews | Contact Us

Anatomy Atlases is curated by Michael P. D'Alessandro, M.D. [Google+ Profile] and Ronald A. Bergman, Ph.D.

Please send us comments by filling out our Comment Form.

All contents copyright 1995-2014 the Author(s) and Michael P. D'Alessandro, M.D. All rights reserved.

"Anatomy Atlases", the Anatomy Atlases logo, and "A digital library of anatomy information" are all Trademarks of Michael P. D'Alessandro, M.D.

Anatomy Atlases is funded in whole by Michael P. D'Alessandro, M.D. Advertising is not accepted.

Your personal information remains confidential and is not sold, leased, or given to any third party be they reliable or not.

The information contained in Anatomy Atlases is not a substitute for the medical care and advice of your physician. There may be variations in treatment that your physician may recommend based on individual facts and circumstances.

URL: http://www.anatomyatlases.org/

This website is certified by Health On the Net Foundation. Click to verify. This site complies with the HONcode standard for trustworthy health information:
verify here.