76 ANATOMY OF THE RABBIT 



4. Thoracicodorsalis a.: Axillary, with long thoracic a.; to 

 sternal ends of pectorals and clavodeltoid muscles and becomes 

 superficial. 



5. Brachial a.: That portion of the trunk artery extending 

 from the axilla to the origin of the ulnar and radial arteries is 

 the brachial. 



6. Subscapularis a.: Brachial; to shoulder region. One of 

 the branches passes through to the teres major, subscapularis, 

 and another (thoracicodorsalis a., cf. 4) perforates the belly of 

 the teres major and becoming superficial at the dorsal margin 

 of the latissimus dorsi m. sends branches to the deltoids and 

 triceps mm. (posterior circumflex a.); to the subscapular, 

 latissimus dorsi, trapezius, supra- and infraspinatus muscles 

 (posterior suprascapular a.) ; to the infraspinatus and latissimus 

 dorsi mm. (circumflex scapulae a.). 



7. Posterior humeral circumflex (postcircumflex) : Dorsal 

 side of axillary near subscapularis; to shoulder region. The 

 main branch passes caudad of the neck of the humerus to the 

 deltoid mm.; branches pass to the coracobrachialis m., medial 

 region of shoulder joint, and long and lateral heads of triceps m. 

 This is probably the homologue of the profunda brachii (sup. 

 profunda a.) of man. Anastomoses and various anomalous 

 origins are found in the elbow region. 



8. Profunda (superior profunda) brachii a.: Brachial; to 

 latissimus dorsi and triceps mm. 



9. Inferior profunda a.: Brachial; to distal end of biceps 

 brachii. 



10. Nutrient a.: Brachial, or inferior ulnar collateral; to 

 nutrient foramen of humerus. 



11. Inferior collateral ulnar (anastomotica magna) a.: 

 Brachial; to meditriceps and elbow region. 



C. NERVES OF THE LEFT SUPERIOR LIMB 



(Nos. 1-9) 

 The brachial plexus (Fig. 24) is formed by fibers from six 

 spinal nerves (cervicals IV-VIII and thoracic I, hereafter 



