ANA 407 Lecture Notes - Lecture 6: Serratus Anterior Muscle, Pectoralis Minor Muscle, Pectoralis Major Muscle

• School: University at Buffalo
• Department: Anatomical Sciences
• Course: ANA 407
• Professor: Karnes

Document Summary

Lateral lip of the bicipital (intertubercular) groove of the humerus. Depresses the clavicle; abducts arm; stabilizes the sternoclavicular joint. Pectoral mm. , serratus anterior m. , axillary lymph nodes, lateral thoracic wall. Circumflex scapular a. mm. on the posterior surface of. First part of axillary, arises near apex of axilla. Second part of axillary, branches off near the lateral border of pectoralis minor m. *35% of people- lateral thoracic a. arises from subscapular or thoracoacromial aa. Arise from the lateral surface of the axillary a. distal to the origin of the subscapular a. Anastomose around the surgical neck of the humerus and may arise from a short common trunk. First part of artery: above pectoralis minor, superior thoracic a. First division: first rib -> medial border of pectoralis minor m. Second part of artery: lies behind pectoralis minor, thoracoacromial a. , lateral thoracic a. Second division: medial border of pectoralis minor m. -> lateral border of pectoralis minor m.