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
This study was based upon 775 laboratory specimens.
Upper Left:Independent branch of thyrocervical trunk; 460 of 775 specimens, 59.35%; 236 right, 224 left.
Upper Middle:Common trunk with transverse cervical artery derived in turn from the thyrocervical trunk; 128 of 775 specimens, 16.51 %; 60 right, 68 left.
Upper Right:Direct branch of the left subclavian artery; 102 of 775 sides, 13.16%; 53 right, 49 left. First portion of subclavian artery in 51; second portion (shaded), 8; third portion, 43.
Lower Left:Common trunk with transverse cervical artery derived from subclavian artery; 34 of 775 extremities, 4.38%; 20 right, 14 left. Branch of first portion of subclavian, 12; second portion, 2; third portion, 20.
Lower Middle Left:Common trunk with internal thoracic artery; 29 of 775 extremities, 3.74%; 9 right, 20 left.
Lower Middle Right: Direct branch of axillary artery; 20 of 775 extremities, 3.74%; 9 right, 20 left.
Lower Right:From common trunk with costocervical trunk; 2 of 775 extremities, 0.26%; both left.
redrawn from from Daseler and Anson, 1959.
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