8o 



THE SUPERIOR EXTREMITY 



supraspinatus, covered by the subacromial bursa, and the 

 upper portion of the lateral aspect of the body of the 

 humerus. Its anterior part covers the coracoid process and 



Spine of scapula 



Transverse scapular artery | 



(O.T. suprascapular) 



Supraspinatus 



Suprascapular nerve 

 Deltoid 



Infraspinatus 

 Circumflex, scap. 

 artery (O.T.)' 

 dorsalis scap. 

 Teres minor 4-' 



Subscapula 



Teres major 



Triang. space 

 Quadrangular space 



Triceps, long, head 

 Radial nerve (O.T. musculo-spiral) 



Triceps, lateral head - 

 N. to triceps, medial head -- 



Triceps, med. head 



Subacromial'bursa 



Infraspinatus muscle 

 Capsule of shoulder- 

 joint 

 N. to m. teres minor 



Deltoid 



Axillary nerve 

 (sup. branch) 



Axillary nerve 

 (inf. btanch) 



Lateral brachial 

 cutaneous nerve 



Lateral head of triceps 



Radial nerve (O.T. 

 musculo-spiral) 



Ant. branch of profundr 

 artery of arm 



Post, branch of profundt 

 artery of arm 

 Dorsal antibrachial 

 cutaneous nerve 



Brachialis 



Ulnar nerve 

 Medial epicondyle --- 



N. to flex. carp. uln. -I 



Olecranon ... 



Lateral epicondyle 

 Recurrent inter- 

 osseous artery 



Anconaeus 

 Kxt. dig. comm. 

 and dig. quint. 

 Ext. carpi ulnans 



FlG. 35. Dissection of the dorsal aspect of the Arm. The lateral head of 

 the Triceps has been divided and turned aside to expose the sulcus on 

 the Humerus for the radial nerve. 



the muscles and ligaments which are attached to it, the long 

 head of the biceps muscle descending in the intertubercular 

 sulcus, and the insertion of the subscapularis into the lesser 

 tubercle of the humerus. The muscle also covers the greater 



