

THE LOWER EXTREMITY, POSTERIOR. 647 



Nerve Supply. The external plantar. 



Action. These muscles have the action common to the 

 dorsal interossei and the lumbricales, of flexing the first 

 set of phalanges and extending the rest; their special 

 action is to adduct the first phalanges of the three outer 

 toes to the middle line running through the second toe. 



DISSECTION. 



The tendons of the peroneus longus, and tibialis posticus remain to be dis- 

 sected. For these muscles see pages 630 and 628. 



