308 FASCLE 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 delicate 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 radius. 
~ Olecranon 
Ulnar head of deep flexor 
Lateral extensor 
Deep flexor (humeral head) 
Extensor carpi obliquus 
\ 
Metacar pal tuberosity —“‘ N 
x 
f ; x 
Tendon from common to lateral extensor ~ 
} Check ligament 
t 
I | i Suspensory ligament 
Lateral small metacarpal bone — fo Flexor tendons 
UY 
Branch of suspensory ligament to — 
extensor tendon 
Flexor tendons 
Cartilage of third phalanx 
Fic. 279.—Muscies or Lerr Tooracic Limp or Horse From Evpow Downwarp; LATERAL VIEW. 
a, Extensor carpi radialis; g, brachialis; g’, anterior superficial pectoral; c, common digital extensor; e, ulnaris lat- 
eralis. (After Ellenberger-Baum, Anat. fiir Kiinstler.) 
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) 
1 Also known as the lateral extensor of the phalanges. 
