MYOLOGY. 7 1 



LATERAL EXTENSOR OF PHALANGES. 



Origin. Outer side of superior tuberosity of radius; from 

 continuous sides of radius and ulna and external lateral ligament. 

 Insertion. Anterior surface of superior portion of first phalanx. 

 Action. As preceding. 

 Nerve. Radial. 



EXTERNAL FLEXOR OF METACARPUS. 



Origin. External condyle of humerus. 



Insertion. Supercarpal and external metacarpal bones. 



Action. Flexes foot. 



Nerve. Radial. 



OBLIQUE FLEXOR OF METACARPUS. 



Origin. Base of epitrochlea and olecranon. 

 Insertion. On supercarpal with preceding. 

 Action. As preceding. 

 Nerve. Ulnar. 



INTERNAL FLEXOR OF METACARPUS. 



Origin. Epitrochlea with preceding. 

 Insertion. Head of internal metacarpal bone. 

 Action. Same as external flexor. 

 Nerve. Radial. 



FLEXOR SUBLIMIS DIGITORUM OR PERFORATUS. 



Origin. Summit of epitrochlea. 



Insertion. By two divisions into superior extremity of second 

 phalanx; between the two divisions passes the perforans tendon. 

 It also passes through the carpal sheath, a reflexion of strong 

 fibres running from the first to the fourth carpal bones. 



Action. Flexes second phalanx and also whole foot. 



Nerve. Ulnar. 



FLEXOR PROFUNDUS DIGITORUM OR PERFORANS. 



Origin. Summit of epitrochlea, summit and posterior border 

 of olecranon and posterior surface of radius. 



Insertion. Passes through carpal sheath, between two heads 



