646 A MANUAL OF ANATOMY. 



brevis hallucis into the outer surface of the base of the 

 first phalanx of the great toe. 



Nerve Supply. The external plantar nerve. 



Action. To adduct and flex the first phalanx of the 

 great toe. 



Transversus Pedis. Fig. 134. 



Origin. From the under surface of the three outer me- 

 tatarsophalangeal articulations, and from the deep trans- 

 verse metatarsal ligaments. 



Insertion. In common with the adductor hallucis, see 

 above. 



Nerve Supply. The external plantar. 



Action. To adduct the first phalanx of the great toe, to 

 draw the metatarsal bones together. 



Flexor Brevis Minimi Dig-iti. Fig. 133. 



Origin. From the under surface of the base of the fifth 

 metatarsal bone and from the sheath of the tendon of the 

 peroneus longus muscle. Into the outer part of the base 

 of the first phalanx of the little toe. 



Nerve Supply. The external plantar. 



Action. To flex and abduct (feebly) the first phalanx of 

 the little toe. 



The Fourth Layer. 



Plantar Interossei. Three in number. (Dorsal, four, 

 see page 592.) Fig. 134. 



Origin. From the under and inner surface of the three 

 outer metatarsal bones. 



Insertion. Slightly into the inner portion of the base of 

 the first phalanges of the third, fourth, and fifth toes, and 

 more especially into the inner margin of the aponeurotic 

 expansion of the tendon of the extensor longus digitorum 

 at the back of the first phalanges of the above toes. 



