86 



THE UPPER EXTREMITY 



humerus, under cover of the lateral head of the triceps, and on 

 the lateral side of the limb it pierces the lateral intermuscular 

 septum and appears in the anterior compartment of the arm. 



Spine of scapula 



A. trans, scapulae (O.T. suprascapular) 

 M. supraspinatus 



M. infraspinatus 



A. circumflex, scap. 

 (O.T. dorsalis , 



scap.) 

 M. teres minor f- 



M. subscapularis - 



M. teres major / 

 Triang. space 

 Quadrangular space 



M. triceps cap. long. 

 N. radialis (O.T. musculo-spiral) 



N. suprascapularis 



M. deltoideus 



A. brachialis 

 M. triceps, cap. lat. - 



N. to m. triceps, cap. med. -- 



M. triceps, cap. med. 



N. ulnaris ... 

 Epicond. med. -- 



N. flex. carp, uln J 



Olecranon ... 



Bursa subacromalis 



M. infraspinatus 



Capsular artic. Articulat. 



humeri ; 



N. to m. teres minor 



M. deltoideus 



N. axillaris (O.T. 

 circumflex) ram. sup. 

 N. axillaris, 

 ram. inf. 



N. cutan. brach. 

 lat. 



M. triceps, cap. lat. 



N. radial is (O.T. 

 musculo-spiral) 



A. prof, brachii ram. ant. 



A. prof, brachii ram. post. 

 N. cut. antib. dorsalis 

 M. brachialis 



Epicond. lat. 



A. inteross. recurr. 



M. anconaeus 

 Mm. ext. dig. 

 comm. et dig. quint. 

 M. ext. carp, ulnaris 



FIG. 37. 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. 



Here it has already been exposed. It lies deeply in the 

 interval between the brachialis on the medial, and the 

 brachioradialis and extensor carpi radialis longus on the 

 lateral side. It ends at the level of the lateral epicondyle of 



