GUIDE
Upper Limb: Neurovasculature
Vascular Supply to the Upper Limb
[Plate 421, Brachial Artery in Situ]Arterial Supply to the Arm
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Axillary artery
Begins at lateral border of first rib and ends at inferior border of teres major
Divided into three descriptive parts by pectoralis minor muscle
First part
First rib to medial border of pectoralis minor
Is enclosed in axillary sheath
One branch-superior thoracic artery supplying serratus anterior
Second part
Posterior to pectoralis minor
Two branches
Thoracoacromial artery
Lateral thoracic artery
Both supply the pectoral muscles and breast
Third part
Lateral border of pectoralis minor to inferior border of teres major
Three branches
Subscapular artery
Largest branch
Divides into circumflex scapular and thoracodorsal arteries
Supplies serratus anterior, teres major, subscapularis, and latissimus dorsi muscles
Anterior and posterior circumflex humeral arteries
Brachial artery