DISSECTION OF THE DOG 



131 



between the muscles. Four tendons leave the tapering end of the muscle, play 

 through a groove at the distal end of the radius, and spread out on the dorsum 

 of the manus. The tendons are finally inserted into the terminal phalanges 

 of the second, third, fourth, and fifth digits. 



a. brachialis 



»«. biceps brachii 



m. supinator - — 



in. extensor carpi . - ~~~ 

 radialis 



a. median a — 



a. radialis 



m. flexor digitorum 

 profundus. Caput radiate 



in. triceps brachii 

 n. medianus 

 n. ulnaris 



m. pronator teres 

 a. inlerossea communis 



f~~—. m. flexor carpi ulnaris 

 m. flexor carpi radialis 



~~~m. pronator quadralus 

 m. flexor digitorum 

 sublimis 



a, ulnaris 



in. flexor digit /nun 

 profundus 



Fig. 49. — Dissection of the medial aspect of the forearm. 



Each tendon expands over the metacarpo-phalangeal articulation, with 

 the capsule of which it is closely connected, and has a sesamoid bone over the 

 proximal interphalangeal joint. In the neighbourhood of the joint between the 

 metacarpal bone and the first phalanx, each tendon is joined by the tendon of 

 one of the smaller extensors of the digit — extensor indie is proprius, extensor 

 tertii et quarti, and extensor digiti quinti. At the distal end of 



k2 



digiti 



