7 6 



THE UPPER EXTREMITY 



collateral artery. It should be sought for at the distal border 

 of the insertion of the coraco-brachialis, and the dissector 

 should not be satisfied until he has traced it into the 

 medullary foramen of the bone. When the nutrient artery 



Radial nerve 



(O.T. musculo- 



spiral) 



Anterior branch 



of profunda -j 

 artery 



Lateral inter- f :*"" 

 muscular septum "t 



Lower collateral 



ulnar artery 



(O.T. an:i- 



stomotic) 



V 



Radial nerve 

 (O.T. musculo-spiral) 



Profunda artery 

 (O.T. superior profunda). - 



, Ulnar nerve 

 Upper collateral 



'ulnar artery (O.T. 

 inferior profunda) 



Ulnar nerve 



Upper collateral 



ulnar artery" 

 Nerve to medial 

 head of triceps (O.T." 



ulnar collateral) /I 



Medial intermuscular Ljf 

 septum Uf 



Lower collateral 

 ulnar artery (O.T. -JU 

 anastomotic) 



sj 



Triceps 

 Gat, head) 



Nerve to lateral 

 'head of triceps 



^ Nerve to long 

 head of triceps 

 Posterior 

 "brachial cutane- 

 ous nerve (O.T. 

 int. cutan. of 

 musculo-spiral) 



Lateral anti- 

 brachial 

 cutaneous 

 ! ; nerves (O.T. 

 !ext. cutan. of 

 ' musculo- 

 spiral) 

 i Posterior 

 Jt-- branch of pro- 

 \ funda artery 



Lateral inter- 

 i- muscular 

 septum 



Nerve to ancona;us 



FIG. 32. Diagram to show relation of Radial Nerve (O.T. Musculo-spiral) 

 to the Humerus and of Vessels and Nerves to the Intermuscular Septa. 



is not seen in its usual position it will probably be found in 

 the dissection of the back of the arm, taking origin from the 

 profunda artery. 



The arteria collateralis ulnaris inferior (O.T. anastomotica) 

 arises about two inches proximal to the bend of the elbow, and 

 runs medially upon the brachialis. It soon divides into a small 

 anterior and a larger posterior branch. The anterior branch is 



