7 6 



THE SUPERIOR EXTREMITY 



spinatus takes origin, and it presents other very apparent 

 connections. Thus, a strong septum, proceeding from its 



Lateral end of clavicle 

 'Margin of acromion 

 Pectoralis major 

 Cephalic vein 



Deltoid 



Cutaneous branches of axillary 

 -(O.T. circumflex) nerve piercing 

 deltoid 



Lateral brachial cutaneous 

 branch of axillary nerve 



Biceps 



Lateral head of triceps 



Brachialis 



Proximal branch of dorsal 

 cutaneous nerve of forearm 



Cephalic vein 



Distal branch of dorsal cutaneous 

 nerve of forearm 



Brachio-radialis 

 Tendon of triceps 



Olecranon 

 Extensor carpi radialis longus 



FIG. 33. The Deltoid Muscle and the lateral aspect of the Arm. 



deep surface, will be noticed to dip in between the infra- 

 spinatus and teres minor muscles, and then, as it proceeds 

 forwards, it gives a thin covering to the teres minor, teres 

 major, and the deltoid. Indeed, it may be said to split into 



