ANAT 315 Lecture Notes - Circumflex Branch Of Left Coronary Artery, Thoracoacromial Artery, Subscapular Artery

• School: McGill University
• Department: Anatomy & Cell Biology
• Course: ANAT 315
• Professor: David J Pearsall

Document Summary

Laboratory: shoulder region iv axilla: axillary artery, vein, and muscles within axilla, axillary artery begins at lateral border of first rib and ends at inferior border of teres major. Continuation of subclavian artery ends by becoming brachial artery. Passes posterior to pectoralis major into the arm before becoming the brachial artery. Anastomoses with intercostal and/or internal thoracic arteries. 2- thoracoacromial artery: short wide trunk, pieces the costocoracoid membrane and divides into four branches: Arises from second branch of the second part of the axillary artery and descends along the lateral border of the pectoralis minor, following it into thoracic wall. Curves around lateral border of scapula to enter infraspinous fossa, anastomosing with suprascapular artery. Continues course of subscapular artery, descending with thoradocorsal nerve to enter pex of latissimus dorsi humeral circumflex artery: Passes laterally , deep to the coracobrachialis and b ceps brachii (ascending branch supplies the shoulder) Encircle the surgical neck of the humerus, anastomosing with each other.