266 



FASCIA AND MUSCLES OF THE HORSE 



with the tendon. A sheath envelops the tendon, Ijeginning 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 fiat and 



Extensor carpi ohliqiius 



Metacarpal tuberosity 



Tendon from anterior to lateral extensor \i 



External small metaearpal hone 



Branch of suspensory ligament to 

 extensor tendon 



Olecranon 



Ulnar head of deep flexor 



Lateral extensor 

 Deep flexor {h umeral head) 



Tendon of flexor carpi externus 

 Accessory carpal bone 



Check ligament 



Susp( nsory ligament 

 Flexor tendons 



Flexor tendons 

 Latend cartilage 



Fig. 191. — Muscles of Left Thoracic Limb of Horse from Elbow Downward; External View. 

 a. Extensor cariji radialis; o, brachialLs; g' , anterior superficial pectoral; c, anterior or common digital ex- 

 tensor; e, flexor carpi externus. (After Ellenberger-Baum, Anat. fiir Ki'mstler.) 



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. 



