62 



TOPOGRAPHICAL ANATOMY OF 



between the second metacarpal bone and the middle interosseous 

 muscle. It follows the medial margin of the deep face of the modified 

 muscle, supplies the nutrient artery of the third metacarpal bone, and 



Third metacarpal bone. 



Second metacarpal bone. 



M. interosseus. .. 

 V. digitalis communis. . 

 N. volaris medialis. 

 A. digitalis communis. 



M. extensor digitorum 

 communis. 



M. extensor digiti 

 quint i. 



Fourth metacarpal 

 bone. 



V. metacarpea volaris lateralis. 

 A. metacarpea volaris lateralis. 

 N. volaris lateralis. 

 M. flexor digitorum profundus. 



M. flexor digitorum sublimis. 

 Fig. 41. — Section across the Metacarpus at the Level indicated by H in Fig. 30. 



ends in the distal third of the metacarpus by uniting with the slender 

 termination of the lateral volar metacarpal artery. The union of the 



M. extensor digitorum communis. 



Third metacarpal one. 



M. interosseus. _ 

 A. digitalis volaris medialis. _ j| 



If. volaris medialis 



V. digitalis medialis 



M. extensor digiti quinti. 



M. interosseus. 



- A. digitalis volaris lateralis. 

 - ■ V. digitalis lateralis.' 



- N. volaris lateralis 



M. flexor digitorum sublimis. 



M. flexor digitorum profundus 

 Fig. 42. — Section across the Metacarpus at the Level indicated by I in Fig. 30. 



two vessels results in the formation of a small artery that, passing 

 between the two limbs of the interrosseous muscle, joins either the 

 common digital or the lateral volar digital artery. 



The lateral volar metacarpal artery (a. metacarpea volaris lateralis) 

 is smaller than the medial vessel of the same name. Under cover of 

 the tendon of the flexor carpi ulnaris it unites with the terminal part 

 of the collateral ulnar artery. After passing the carpus along the 



