658 



BLOOD-VASCULAR SYSTEM OF THE HORSE 



given off from the median at an acute angle, usually a little above the lateral 

 one or by a common trunk with. it. It passes down the medial side of the carpus 

 behind the tendon of the flexor carpi radialis and embedded in the posterior annular 

 ligament. Arriving at the proximal end of the medial metacarpal bone it becomes 

 more deeply placed and is connected with the lateral volar artery by one or two 

 transverse branches, as stated above. It then pursues a flexuous course downward 



Medial ligament of car-pus 



Tendon of extensor carpi radialis 

 Tendon of extensor carpi ohliquus 



Medial ligament of fetlock joint 



Common extensor tendoit 



Extensor branch of suspensory 

 ligatnent 



Dorsal artery of first phalanx 



Medial ligament of pastern joint 



Lateral metacarpal vein 

 Medial metacarpal vein 



Posterior annular ligament of 

 carpus 



Superficial flexor tendon 

 Medial volar nerve 



Communicating branch 

 Common digital artery 

 Medial metacarpal vein 

 Suspensory ligament 

 Lumbricalis muscle 

 Dorsal digital nerve 

 Volar digital nerve 

 Digital artery 

 Digital vei?i 

 Ligament of ergot 

 Deep flexor tendon 

 Cartilage of third phalanx 



Coronary plexus 



Fig. 572.- 



Coronary corium 

 Laminar corium 



-Dissection of Right Carpus, Metacarpus, and Digit of Horse; Medial View. (After Schmaltz, Atlas 



d. .\nat. d. Pferdes.) 



alongside of the medial small metacarpal bone, like the corresponding lateral 

 artery, with which it commonly unites as described above. It is larger than the 

 lateral artery, and supplies the nutrient artery to the large metacarpal bone. 



The foregoing account describes the most common arrangement of the dorsal and volar 

 metacarpal arteries. Variations in their origin and connections are common, but have no great 

 surgical importance. Collateral branches are omitted for the same reason. In some cases the 

 medial volar metacarpal is connected with the common digital artery a little below the carpus by 

 a branch passing obliquely across the medial border of the deep flexor tendon; this forms a super- 

 ficial volar arch. 



