7o 



EQUINE ANATOMY. 



FIG. 7. 



OBLIQUE EXTENSOR OF METACARPUS. 



Origin. External surface of ra- 

 dius. % 



Insertion. Head of internal me- 

 tacarpal with internal lateral liga- 

 ment. 



Action. Extends metacarpus and 

 rotates them outward. 



Nerve. Radial. 



ANTERIOR EXTENSOR OF PHALANGES. 



Origin. Below crest of furrow of 

 torsion, of humerus, and in front 

 of its inferior extremity; the ex- 

 ternal lateral ligament of elbow and 

 external tuberosity and border of 

 radius. 



Insertion. Pyramidal eminence 

 of third phalanx, capsular ligament 

 of fetlock- joint and anterior surfaces 

 of first and second phalanges. 



Action. As name implies. 



Nerve. Radial. 



FIG. 7. EXTERNAL MUSCLES OF THE RIGHT 

 ANTERIOR LIMB. 



i, i, Long abductor of the arm; i', Its humeral 

 insertion; 2, Superspinatus; 3, Subspinatus; 

 3', Its tendon of insertion; 4, Short ab- 

 ductor of the arm; 5, Biceps; 6, Anterior 

 brachialis; 7, Large extensor of the fore- 

 arm; 8, Short extensor of the forearm; 9, 

 Anconeus; u, Anterior extensor of the 

 metacarpus; n', Its tendon; iz.Aponeurosis 

 separating that muscle from the anterior 

 brachialis; 13, Oblique extensor of the 

 metacarpus; 14, Anterior extensor of the 

 phalanges; 14', Its principal tendon; 15, 

 The small tendinous branch it furnishes to 

 the lateral extensor; 16, Lateral extensor of 

 the phalanges; 16', Its tendon; 17, The 

 fibrous band it receives from the carpus; 

 18, External flexor of the metacarpus; 19, 

 Its metacarpal tendon; 20, Its supracarpal 

 tendon; 21, Ulnar portion of the perforans; 

 22, Tendon of the perforans; 23, Its carpal 

 ligament; 24, Its reinforcing phalangeal 

 sheath; 25, Tendon of the perforatus. 



