268 



ANATOMY OF THE RABBIT 



Lateral 



or posteromedial surface of the radius and ulna. Insertion volar, 

 the tendons (except that of a) passing under a very strong trans- 

 verse carpal ligament, which stretches from the navicular and 

 greater multangular to the pisiform and hamate bones. 



(a) The pronator teres. Origin: Medial epicondyle. Insertion: 



Ventral surface of the radius. 

 {h) The flexor carpi radialis. Origin: Medial epicondyle. In- 

 sertion: Base of the second metacarpal. 

 {c) The flexor digitorum sublimis. Origin: In common with 

 the ulnar portion of the profundus from the medial epicon- 

 dyle; proximal portion 

 Dorsa/ of the ulua. Insertion: 



Bases of the second phal- 

 anges of the four lateral 



Medial digits. 



{d) The palmaris. Origin: 

 Medial epicondyle. In- 

 sertion: Superficially on 

 the volar fascia. This 

 extremely slender muscle 

 lies between the super- 

 ficial portion of the pro- 

 fundus and the flexor 

 carpi ulnaris. 

 {e) The flexor digitorum pro- 

 fundus. Origin in four 

 portions. Superficial 



portion: Medial epicon- 

 dyle. Radial portion: Ventral surface of the radius. Mid- 

 dle portion: Ventral surface of the ulna. Ulnar portion: 

 Medial epicondyle in common with (c). Insertion: By 

 five tendons on the bases of the ungual phalanges. In 

 exposing these, care should be taken not to destroy the 

 flexor digiti quinti (6, a). 



The flexor carpi ulnaris. Origin: Medial epicondyle and 

 medial surface of the olecranon, forming two short but 

 separate heads. Insertion: Pisiform bone. 



Fig. 103. Transverse section of the distal end of 

 the forearm. Showing the relative positions of the 

 muscle tendons: ap, abductor poUicis; ar, radial 

 artery; au, ulnar artery; ecu, extensor carpi ul- 

 naris; edc, extensor digitorum communis; emp, 

 extensor digiti quinti proprius; epi, extensor pol- 

 licis et indicis; eqp, extensor digiti quarti pro- 

 prius; erb, extensor carpi radialis brevis; erl, 

 extensor carpi radialis longus; fer, fiexar carpi 

 radialis; feu, flexor carpi ulnaris; fdp, flexor digi- 

 torum profundus; fds, flexor digitorum sublimis; 

 led, dorsal carpal ligament; let, transverse carpal 

 ligament; nm, median nerve; nu, ulnar nerve; p, 

 palmaris; r, radius; u, ulna; vc, cephalic vein; 

 vr, radial vein; \ti, ulnar vein. 



(/) 



