308 



FASCIA AND MUSCLES OF THE HORSE 



the extensor carpi radialis; behind, the lateral extensor and the interosseous 

 vessels. 



Blood-supply. — Radial and interosseous arteries. 



Nerve-supply. — Radial nerve. 



Lesbre reports that he has found in one case a brachioradialis muscle in the horse. It 

 was a deUcate fleshy bundle, superposed on the medial border of the common extensor, and ex- 

 tended from the lateral condyloid crest to the distal part of the medial border of the radms. 



Extensor carpi ohliquus 



Metacarpal t uberosity 

 Tendon from common to lateral extensor 



Lateral small metacarpal hone 



Branch of suspensory ligament to 

 extensor tendon 



Olecranon 



Ulnar head of deep flexor 



Lateral extensor 

 Deep flexor (humeral head) 



Tendon, of ulnaris lateralis 

 Accessory carpal hone 



Chech ligarnent 



C Suspensory ligament 

 Flexor tendons 



Flexor tendons 

 Cartilage of third phalanx 



Fig. 279. — Muscles of Left Thobacic Limb of Horse feom Elbow Downward; Lateral View. 

 a, Extensor carpi radialis; g, brachialia; g\ anterior superficial pectoral; c, common digital extensor; e, ulnaris lat- 

 eralis. (After EUenberger-Baum, Anat. fiir Kiinstleri) 



3. Lateral digital extensor (M. extensor digitalis lateralis s. digiti quinti pro- 

 prius) .-^ — This muscle is much smaller than the preceding, behind which it is situated. 

 Origin. — The lateral tuberosity of the radius and the lateral ligament of the 

 ^ Also known as the lateral extensor of the phalanges. 



