DISSECTION OF THE UPPER EXTREMITY 



99 



(b) Common volar digital nerves (Nn. digitales volares communes). 

 Three from N. medianus. 

 The second supplies M. lumbricalis II. 

 The third gives off the ramus anastomoticus cum N. ulnari. 

 (ba) Proper volar digital nerves (Nn. digitales volares propriae) 

 (0. T. collateral digital nerves). Seven from N. me- 

 dianus, 



FIG. 35. 



A. radial 



M. abductor poll, longus- 



N. medianus l^^^H 



M. flexor carpi rad. '-^^ 



M. adductor pollicis brevis 



M. flexor brevis pollic 



M. adductor pollicis 



N. ulnaris 



R. profundus 

 R. superficialis 



M. abductor digit! V. 



M. flexor brevis digiti V. 



I Anastomosis 



M. interossea dorsalis I. 



N. digiti volaris { 



Nerves of the volar surface of the hand. (After Gegenbaur, Lehrb. der Anat. des Mensch., Leipzig, 

 1899, 7 Aufl., Bd. ii. S. 499, Fig. 660.) 



I. and II. to skin of thumb; 



III. to skin of radial side of index and to M. lum- 

 bricalis I.; 



IV. to skin of ulnar side of index; 



V. to skin of radial side of digitus medius; 



VI. to skin of ulnar side of digitus medius ; 



VII. to skin of radial side of digitus annularis. 

 Work one of these out to its two terminals, (1) volar, 



