with the brachiahs). Behind the biceps is the extensor anti- 

 brachialis, also called the omoanconeus. This muscle is a 

 part of the latissimus dorsi extending to the antibrachium, 

 or forearm, from the area of insertion of the latissimus. 

 Along the posterior margin of the upper arm is seen the long 

 head of the triceps. 



The forearm muscles are more numerous and therefore 

 more difficult to identify (Figure 14-7). For orientation pur- 

 poses the forearm can be thought of as having anterior and 

 posterior margins, and dorsal and ventral surfaces. On the 

 dorsal aspect, beginning at the anterior margin, is the 

 brachioradialis which inserts on the radiale bone of the 



extensor carpi radialis longus 

 extensor carpi radialis brevis 



pectoralis 



triceps brachii 

 pars laterale 



triceps brachii 

 pars mediale 



triceps brachii pars longum 



extensor antibrachialis-_ 



palmaris longus' 

 caput olecranonsis 



flexor digitorum profundus 



Figure 14-7. Forearm musculature of the cat. A, superficial muscles of dorsal aspect; B, deeper 

 layer; C, superficial muscles of ventral aspect; D, intermediate and deep layers of muscles; E, deep 

 layer. 



SKELETAL MUSCULATURE 



427 



