ANTERIOR MUSCLES OF THE FOREARM. 209 



FLEXOR CARPI ULNARIS. 



Origin By two heads, first from internal epicon- 

 dyle, second from inner side of olecranon and from 

 posterior border of ulna. 



Insertion Pisiform bone and metacarpal of little finger. 



Nerve Ulnar. 

 FLEXOR SUBLIMIS DIGITORUM. 



Origin Largest of the superficial layer from internal 

 epicondyle, from coronoid process of ulna, from ob- 

 lique line of radius. 



Insertion Divides into four tendons, which pass 

 beneath the annular ligament and are inserted at 

 the sides of the bases of the second phalanges of the 

 fingers. 



Nerve Median . 



Deep Layer. 

 FLEXOR PROFUNDUS DIGITORUM. 



Origin Upper two-thirds of shaft of ulna, from base 

 of coronoid process, from ulnar half of interosseous 

 membrane. 



Insertion Divides into four tendons, which pass be- 

 neath the annular ligament, then perforate the tendon 

 of the flexor sublimis digitorum, and are inserted 

 into the bases of the third phalanges. 



Nerves Ulnar and anterior interosseous of the median. 

 FLEXOR LONGUS POLLICIS. 



Origin Upper two-thirds of radius, radial half of 

 interosseous membrane, and from base of coronoid 

 process. 



Insertion Base of last phalanx of thumb. 



Nerve Anterior interosseous. 

 PRONATOR QUADRATUS. 



Origin Lower one-fourth of anterior surface of the 

 ulna. 



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