THE UPPER LIMB 



363 



arteries round the elbow-joint are very free. In front of the 

 internal epicondyle of the humerus the anterior branch of the 

 anastomotica magna of the brachial anastomoses with the anterior 

 ulnar recurrent. Behind the internal epicondyle the inferior 

 profunda and the posterior branch of the anastomotica magna 

 (both of the brachial) anastomose with the posterior ulnar 

 recurrent. In front of the external epicondyle the anterior ter- 

 minal branch of the superior profunda of the brachial anastomoses 

 with the radial recurrent. Behind the external epicondyle the 



Inferior Profunda 



Posterior Branch of 

 Anastomotica Magna 



Internal Epicondyle. 



Olecranon Rete 



Posterior Ulnar Recurrent 



Superior Profunda 

 Posterior Branch) 



Arterial Arch 

 External Epicondyle 



""-.-.• Branches of Radial 

 Recurrent 



Posterior Interosseous 



Recurrent 



Posterior Interosseous 



Fig. 



198. — The Anastomoses round the Right Elbow-Joint 

 (Posterior View) (after Tiedemann). 



posterior terminal branch of the superior profunda anastomoses 

 with the posterior interosseous recurrent. Upon the back of the 

 shaft of the humerus, immediately above the olecranon fossa, a 

 transverse anastomosis takes place between the posterior branches 

 of the superior profunda and anastomotica magna, both of the 

 iirachial. Upon the back of the olecranon process is the olecranon 



1 terial rete, which is formed by branches of the posterior inter- 



sseous recurrent and posterior ulnar recurrent. 



Varieties. — (i) The ulnar artery may arise high up from the bracliial, or 

 xillary. In cases of high origin the vessel usually descends over the muscles 



