Illustrated Encyclopedia of Human Anatomic Variation: Opus II: Cardiovascular System
Ronald A. Bergman, PhD
Adel K. Afifi, MD, MS
Ryosuke Miyauchi, MD
Peer Review Status: Internally Peer Reviewed
Frequency of position of dorsal scapular artery as it passes through the brachial plexus.
Above: The dorsal scapular artery arose from the thyrocervical trunk in 30 % of cases, from the second part of the subclavian (behind the anterior scalene muscle) in 34%, and from the third part of the subclavian (lateral to the anterior scalene) in 33%. The subclavian artery is considered divided (by anatomists) into three parts by the anterior scalene muscle. Segment medial to the anterior scalene muscle is the first part, subclavian 1; the portion behind the moscle is the second part, subclavian 2; and the part lateral to the muscle is the third part, subclavian 3.
Below: This illustration shows the frequency of the various positions of the dorsal scapular artery as it passes trrough the branching of nerves of the brachial plexus(o).
redrawn from Huelke, 1958
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