266 



FASCIA AND MUSCLES OF THE HORSE 



with the tendon. A sheath envelops the tendon, beginning about three inches 

 (ca. 6 to 8 cm.) above the carpus, and reaching to the proximal end of the metacarpus. 

 At the fetlock a small bursa lies between the tendon and the joint capsule, but 

 otherwise the tendon is adherent to the capsule. The tendon becomes flat and 



Extensor carpi obliquus 



Metacarpal tuberosity ~ 

 Tendon from anterior to lateral extensor 



External small metacarpal bone 



Branch of suspensory ligament to 

 extensor tendon 



Olecranon 



Ulnar head of deep flexor 



Lateral extensor 

 Deep flexor {humeral head) 



Tendon of flexor carpi exfernus 

 Accessory carpal bone 



Check ligament 



Suspensory ligament 

 ^ >' Flexor tendons 



Icxor tendons 

 Lateral cartilage 



Fig. 191. — Mu.scles op Left Thoratk^ I.imm of Horse from Elbow Downward; External View. 



a. Extensor carpi radialis; a, brachialis; .'/', anterior superficial pectoral; r, anterior or common digital ex- 



ten.-sor; e, flexor carpi externus. (,\fter Ellenberger-Baum, Anat. fiir Kiinstler.) 



much larger below the carpus, having received the tendon of the radial head of the 

 anterior extensor and a strong band from the accessory carpal bone. 



Relations. — Superficially, the skin and fascia; deeply, the outer face of the 

 radius and ulna; in front, the common extensor, the oblique extensor, and the 

 interosseous artery ; behind, the external flexor of the carpus and the deep flexor of 

 the digit. 



Blood-supply. — Interosseous artery. 



