558 



BLOOD-VASCULAR SYSTEM OF THE HORSE 



3. The anterior circumflex (or ]irehumeral) artery (A. circumflexa humeri 

 anterior) arises usually at the upper border of the teres major. It passes forward 

 and outAvard between the two parts of the coraco-brachialis or between the latter 



Ulnar nerve 



Brachial vessels 

 Median nerve 



Cephalic rein 

 Anastomotic branch 



Cutaneous branch of 



median nerve 



Extensor carpi radiahs 



Median nerve 



Accessory cephalic vein 



Cephalic vein 



Post, radial {or median) 

 artery 



Flexor carpi internus (cut) 



Internal lateral ligament 



of carpus 



Tendon of extensor 



carpi obliquus 



Metacarpal tuberosity 



Dorsal interosseous artery 

 and nerve 



— Long head of triceps 



hiternal head of triceps 



Ulnar vessels 



Tensor fascicc antibrachii (cut) 



Ulnar head of flexor carpi medius 

 Humeral origin of flex, carpi med. 

 Origin of flexor carpi internus 



Common interosseous artery 

 Superficial flexor of digit 

 Ulnar head of deep flexor 

 Fascia, cut and reflected 

 Deep flexor of digit 

 Ulnar vessels and nerve 



Outer branch \ of median 

 Inner branch / nerve 



Tendon of flexor carpi internvs 



Flexor carpi medius {cut) 

 Ext. volar met. artery 

 Ext. met. nerve 

 Ext. met. vein 

 Int. met. nerve 

 Large met. artery 

 Int. volar met. artery 

 — Branch to deep volar arch 

 Superficial flexor tendon 

 Check ligament 

 Internal metacarpal vein 



Fit;. 442. — DissKCTioN of Right Forearm and Carpus of Horse, Internal Surface. 

 C-b.. Coraco-hrachialis muscle; E.m., internal epicondyle of humerus; R, subcutaneous surface of radius. (After 



Schmaltz, Atlas d. Anat. d. Pferdes.) 



and the humerus. It gives branches to the coraco-brachialis and deep pectoral and 

 ends in the upper part of the biceps and in the mastoido-humeralis. It anastomoses 

 Avith the posterior circumflex. 



