232 



HISTORY OF THE HUMAN BODY 



radius and into certain of the radial carpals, the other along 

 the ulna and into ulnar carpals. 



The ventral (palmar) aspect of the limb is more complicated 

 in respect to its muscles. These are covered superficially by a 

 dense palmar fascia or aponeurosis (//>), to which many of the 



II 



III ' 



FIG. 62. Muscles of the fore-paw of Necturus ; dorsal aspect 



(a) Superficial muscles. (b) Deeper muscles. 



da, djrsalis antebrachii, its separate insertions into the metacarpalia are shown 

 in (b) ; er, radial extensor; eu, ulnar extensor; fu, ulnar flexor, showing from the 

 other side; xx, extensores breves; s, supinator; zz, intermetacarpales. 



ventral muscles are attached. This aponeurosis is a continu- 

 ation of the fascia covering the ventral muscles of the forearm 

 and appears at its thickest and densest as it passes over the car- 

 pal and metacarpal regions. At the separation of the digits this 

 aponeurosis is also divided into four bands which run along 

 the ventral surface of the separate digits and insert into the 



