MUSCLES OF THE RIGHT SUPERIOR LIMB 59 



31. Flexor profundus digitorum m.: Three heads from 

 region of medial epicondyle of humerus and elbow joint and 

 two from middle third of ulna and radius; to the distal phalanges 

 of all digits. Do not transect. The tendons of this muscle 

 perforate those of the subUmis m. (30) at the metacarpophalan- 

 geal articulations. 



32. Flexor carpi radialis m. : Medial epicondyle of humerus; 

 to volar side of proximal end of third metacarpal. Flexes 

 carpus. This is a long slender muscle with a long round tendon 

 which passes along the caudal side of the radius, between the 

 first metacarpal and os magnum to its insertion on the third 

 metacarpal. The entire tendon is covered and firmly held in 

 place by tendonous material. Method: It is a tedious task to 

 demonstrate the insertion of the tendon of this muscle. How- 

 ever, it is best accompHshed after the pollicis tendon of the 

 flexor profundus m. (31) has been severed. Only experience 

 can suggest the best method of digging this tendon out of its 

 sheath. 



