68 EQUINE ANATOMY. 



ADDUCTOR OF THE ARM. 



Origin. Dorsal angle of humerus and subscapularis. 

 Insertion. Circular imprint of humerus. 

 Action. As name implies, also internal 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. Subscapular. 



BRACHIAL REGION. 



CORACO-R ADIALIS . 



Origin. Coracoid process through bicipital groove. 

 Insertion. Bicipital tuberosity on superior and inner border 

 of radius, capsular and internal lateral ligament. 

 Action. 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 FOREARM. 



Origin. Aponeurosis from posterior border of scapula. 

 Insertion. Posterior border of ulna and anti-brachial aponeuro- 

 sis. 



