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. Iracfdalis 



m. biceps brachu 



m. supinator- 



m. extensor carpi . - - 

 radinlis 



a. meJiana -" 



a. radialis r 



m. flexor digitorum _ _ -l. 

 profundus. Caput radiale 



\L_ m. triceps hrachii 



__-n. medianus 

 —-- n. ulnaris 



m. pronator teres 



, a. interossea communis 



"■~-- m. flexor carpi uinaris 

 ---^ _^7K. flexor carpi radialis 



^^ ~^m. pronator quadratus 

 m, flexor digitorum 

 sublimis 



a, ulnaris 



m. flexor digitorum 

 profundus 



Pjg, 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 indicis proprius, extensor 

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

 ^ k2 



