34 



THE SUPERIOR EXTREMITY 



whilst the third part of the axillary artery is covered, in its 

 proximal half, by the pectoralis major, its distal half is covered 

 only by the skin and fasciae. Behind it, proximo-distally, are 

 the subscapularis, the tendon of the latissimus dorsi, and 

 the teres major; but it is separated from the subscapularis 

 muscle by the axillary (O.T. circumflex) and radial (O.T. 

 musculo-spiral) nerves, and from the latissimus dorsi and the 

 teres major by the radial nerve. To its lateral side is the 



Lateral cord 



Posterior cord lofbrachial plexus 

 : Medial cord J 



I 



. Musculo-cutaneous nerve 

 Median nerve (lateral head) 

 Median nerve (medial head) 

 Medial cutaneous nerve of the forearm 

 Medial cutaneous nerve of the arm 



Median nerve 



Ulnar nerve 

 Radial nerve (O.T. musculo-spiral) 

 FIG. 17. Diagram to show relations of Axillary Vessels and Nerves. 



coraco-brachialis muscle, but between the muscle and the artery 

 are the musculo-cutaneous and the median nerves. To the 

 medial side of the artery is the vein, with the medial 

 cutaneous nerve of the forearm in the anterior angle between 

 the artery and vein, and the ulnar nerve in the posterior angle 

 between the artery and vein. The medial cutaneous nerve 

 of the arm lies along the medial side of the vein (Fig. 17). 



The branches of the axillary artery have been seen at 

 different stages of the dissection. They should now be ex- 

 amined more fully (Fig. 15). They are: 



