Abdominal part artery of axillary artery: proposed term for the artery supplying the abdominal part of the musculus pectoralis major.
In 1976, the authors reported that the abdominal part artery (Pab) supplying the abdominal part of the pectoralis major muscle usually originates from the axillary artery (Ax). The findings in the present study show that the type of origin of this artery most frequently encountered is type 2-a (44.0%) in which the Pab, as an independent branch (type a), branches out of the second part of the Ax (type 2). The second and third most frequently encountered types are type 2-b (17.0%), where the Pab has a common trunk with the thoracoacromial artery, and type 2-c (10.0%), where it has a common trunk with the lateral thoracic artery. By classification according to the supplying areas, 67% was type I-B, supplying the lower part of the pectoralis minor muscle and the abdominal part of the muscle. In 5%, the branch as type I-A courses down to the sternocostal part. In most cases (types A and B in 91%), this artery originates from the Ax proximal to the ansa mediana of the brachial plexus; however, in 4% providing the superficial brachial artery, the Pab branches out from the superficial brachial artery. Based on those findings, the authors would propose that the artery be named the arteria partis abdominalis or Pab.
Sato
Y
Y
First Department of Anatomy, Kyorin University School of Medicine, Tokyo, Japan.
Takafuji
T
T
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001158:Arteries / Q000033:anatomy & histology; D001917:Brachial Plexus / Q000033:anatomy & histology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010369:Pectoralis Muscles / Q000098:blood supply*; D009626:Terminology as Topic