656 BLOOD-VASCULAR SYSTEM OF THE HORSE 
Emerging from the space it gives off branches to the ulnaris lateralis, and the small 
recurrent interosseous artery (A. interossea recurrens), which ascends on the lateral 
Radius 
Artery of rete carpi volare 
Accessorio-radial lig. 
Oblique ligament 5 
f : Accessorto-ulnar lig. 
Medial lig Lateral lig. 
= Check ligament 
First carpal bone 
Accessorio-metacar pal lig. 
Deep volar metacarpal arteries Deep volar arch 
Suspensory ligament 
Medial metacarpal bone Lateral metacarpal bone 
Fig. 569.—Derrp Dissection or RicHT Carpus or Horse; Posterior View. 
1, Radial carpal bone; 2, accessory carpal bone; 3, second carpal bone. (After Schmaltz, Atlas d. Anat. d. Pferdes.) 
Tendon of extensor 
carpi radialis 
Joint ¢ apsule 
Tendon of extensor 
carpi obliquus 
Tendon of lateral ct Medial ligament 
exrtensor 
Lateral ligament = 
Tendon of flexor 
Long tendon of 
carpt radialis 
ulnaris lateralis 
; —— Common digital vein 
Superficial branch 
y Medial volar meta- 
of ulnar nerve 
carpal artery 
Common digital artery 
Lateral metacarpal vein 
Lateral volar metacarpal artery 
Fie. 570.—Cross-sectTion OF PRoxIMAL Part oF Lerr Carpus or Horse, 
Cr, Ci, Cu, Ca, radial, intermediate, ulnar, and accessory carpal bones; 1, superficial flexor tendon; 2, deep flexor 
tendon; 3 (on volar carpal ligament), carpal canal; 4, oblique ligament from radius to radial carpal bone; 5, tendon of 
common extensor; 6, medial volar nerve; 7, lateral volar nerve. Synovial cavities are black. 
surface of the ulna and anastomoses with the deep brachial and ulnar arteries. 
Under cover of the common digital extensor it connects with the anterior radial 
artery and gives off the dorsal interosseous artery (Fig. 568). This vessel (A. 
