3 o6 APPLIED ANATOMY. 



i. THE FLEXORS AND EXTENSORS OF THE FINGERS. 



The fingers are moved by two sets of muscles, a long set arising from the lore- 

 arm and a short set which is confined to the hand. At present we are concerned 

 only with the long extensors and flexors which are found in the forearm. 



Brachialis anticus- 

 Biceps - 



Brachioradialis (supinator longus) 



-Pronator radii teres 



-Flexor carpi radialis 

 -Palmaris longus 



-Flexor sublimis diRitorum 

 Flexor carpi ulnaris 



Flexor longus pollicis- 



Pronator quadratus. 



1 



FIG. 322. Superficial view of the anterior muscles of the forearm. 



THE FLEXORS OF THE FINGERS. 



The flexors of the fingers consist of three separate groups of muscles: (i) the 

 flexor profundus digitorum and flexor longus pollicis, which insert into the distal 

 phalanges; (2) the flexor sublimis digitorum; (3) the palmaris longus which, 

 spreading out into the palmar fascia, is attached to the heads of the metacarpal 



