68 EQUINE ANATOMY. 



ADDUCTOR OF THE ARM. 



Origin. — Dorsal angle of humerus and subscapularis. 

 Insertion. — Circular imprint of humerus. 

 Action. — As name implies, also mternal rotator. 

 Nerve. — Eighth cervical. 



CORACO-BRACHIALIS. 



Origin. — Coracoid process. 



Insertion. — Above internal tuberosity and anterior face of 

 humerus. 



Action. — Adductor internal rotator. 

 Nerve. — Musculo-cutaneous. 



SMALL SCAPULO-HUMERALIS. 



Origin. — Above glenoid cavity. 



Insertion. — Into capsular ligament. 



Action. — Raises capsular ligament during flexion. 



Nerve. — Subsca pular. 



BRACHIAL REGION. 



CORACO-RADIALIS. 



Origin. — Coracoid process through bicipital groove. 

 Insertion. — Bicipital tuberosity on superior and inner border 

 of radius, capsular and internal lateral hgament. 

 Actio7i. — Flexes forearm. 

 Nerve. — Musculo-cutaneous. 



HUMERO-RADIALIS. 



Origin. — Posterior face of humerus below head. 



Insertion. — Passes through groove on radius under internal 

 lateral ligament into upper end of radius and ulna. (Winds 

 through twisted furrow of humerus.) 



Action. — Flexes forearm. 



Nerve. — Radial. 



LONG EXTENSOR OF FORSARM. 



Origin. — Aponeurosis from posterior border of scapula. 

 Insertion. — Posterior border of ulna and antibrachial aponeu- 

 rosis. 



