214 ANATOMY OF THE RABBIT. 
(f) The extensor digiti quarti proprius. 
Insertion: Ungual phalanx of the fourth digit. 
(g) The extensor digiti quinti proprius. 
epicondyle and lateral surface of the ulna. 
epicondyle. 
Origin: Latera 
Origin: Lateral 
Insertion: 
Head of the fifth metacarpal and base of the first phalanx of 
this digit. 
(h) The extensor carpi ulnaris. 
or posteromedial surface of the radius and ulna. 


Dorsal 
vc. oa p J erb 
led. Sgt ef en 
S IE a 2 
CqP.. (5 aD 
Weeal emp._f Th Medial 
ecu..\\e 
au_.\“ fs) hp 
vu--~ ‘~_ar 
lct- nm 
Volar 
Fic. 75. Transverse section of the distal end 
of the forearm. Showing the relative positions of 
the muscle-tendons: ap, abductor pollicis; ar, 
radial artery; au, ulnarartel1y; ecu, extensor carpi 
ulnaris; ede, extensor digitorum communis; 
emp, extensor digiti quinti proprius; epi, extensor 
pollicis et indicis; eqp, extensor digiti quarti pro- 
prius; erb, extensor carpi radialis brevis; erl, 
extensor carpi radialis longus; fer, flexor carpi rad- 
ialis; fcu, flexor carpi ulnaris; fdp, flexor digitorum 
profundus; fds, flexor digitorum sublimis; lcd, 
dorsal carpal ligament; Ict, transverse carpal liga- 
ment; nm, median nerve; nu, ulnar nerve; p, 
palmaris; r, radius; u, ulna; vc, cephalic vein; 
vr, radial vein; vu, ulnar vein. 
Origin: Lateral epicondyl 
and proximal portion of the lateral surface of the ulna 
Insercion: Base of the fifth metacarpal. 
B. Flexor group. The muscles have a general area of origin 
from the medial epicondyle of the humerus and the posteroventral 
(a) 
(b) 
(c) 
Insertion volar. 
The pronator teres. 
Origin: Medial epi- 
condyle. Insertion 
Ventral surface of th: 
radius. 
The flexor carpi rad- 
ialis. Origin: Medial 
epicondyle. Insertion: 
Base of the second 
metacarpal. 
The flexor digitorum 
sublimis. Origin: In 
common with the ul- 
nar portion of the pro- 
fundus from the medial 
epicondyle; proximal 
portion of the ulna. 
Insertion: Bases of the 
second phalanges of the four lateral digits. 
(d) The palmaris. Origin: 
Medial epicondyle. 
This extremely slender 
Superficially on the volar fascia. 
muscle lies between the superficial portion of the profundus 
and the flexor carpi ulnaris. 
(e) The flexor digitorum profundus. 
Superficial portion: Medial epicondyle. 
Radial portion: Ventral surface of the radius. 
Insertion: 
Origin in four portions: 
