. Anatomy, descriptive and applied. Anatomy. THE AXILLARY ARTERY 639 The alar thoracic is a small branch which supplies the nodes and areolar tissue of the axilla. Its place is frequently supplied by branches from some of the other thoracic arteries. The subscapular (a. siibscapidaris), the largest branch of the axillary artery, arises opposite the lower border of the Subscapularis muscle, and passes down- ward and backward along its lower margin to the inferior angle of the scapula, where it anastomoses with the long thoracic and intercostal arteries and with the posterior scapular branch of
. Anatomy, descriptive and applied. Anatomy. THE AXILLARY ARTERY 639 The alar thoracic is a small branch which supplies the nodes and areolar tissue of the axilla. Its place is frequently supplied by branches from some of the other thoracic arteries. The subscapular (a. siibscapidaris), the largest branch of the axillary artery, arises opposite the lower border of the Subscapularis muscle, and passes down- ward and backward along its lower margin to the inferior angle of the scapula, where it anastomoses with the long thoracic and intercostal arteries and with the posterior scapular branch of the trans- verse cervical, and terminates by sup- plying branches to the muscles in the neighborhood. About an inch and a half from its origin it gives off a large branch, the dorsalis scapulae. The dorsalis scapulae (a. circumflexa scapulae) is generally larger than the continuation of the subscapular. It curves around the axillary border of the scapula, leaving the axilla through the space between the Teres minor above, the Teres major below, and the long head of the Triceps externally (Fig. 457), and enters the infraspinous fossa by passing under cover of the Teres minor, where it anastomoses with the posterior scapular and suprascapular arteries. In its course it gives off two branches: one (infrascapular) enters the subscapular fossa beneath the Subscap- ularis, which it supplies, anastomosing with the posterior scapular and supra- scapular arteries; the other is continued along the axillary border of the scapula, between the Teres major and minor, and, at the dorsal surface of the inferior angle of the bone, anastomoses with the posterior scapular. In addition to these, small branches are distributed to the back part of the Deltoid muscle and the long head of the Triceps, anastomosing witli an ascending branch of the superior profunda of the brachial. The circumflex arteries wind around the surgical neck of the himierus. The posterior circumflex (a. circumflexa hum- eri p
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1913
