166 HUMAN ANATOMY. 



Third Set. 



FLEXOR BREVIS POLLICIS. Origin, from the external cune- 

 iform bone, and the internal border of the cuboid bone, and 

 the tendinous expansion of the tibialis posticus; insertion, into 

 the first phalanx of the great toe on either side; action, flexes 

 first phalanx of great toe; nerves, the internal plantar and some- 

 times a branch from the external plantar. 



ADDUCTOR POLLICIS. Origin, from the bases of the second, 

 third, and fourth metatarsal bones and from the sheath of the 

 tendon of the peroneus longus; insertion, into the base of the 

 first phalanx of the great toe on the outer side; nerve, external 

 plantar. 



FLEXOR BREVIS MINIMI DIGITI. Origin, from the sheath 

 of the peroneus longus and the base of the metatarsal bone of the 

 little toe; insertion, into the outer side of the base of the little 

 toe; nerve, external plantar. 



TRANSVERSUS PEDIS. Origin, from the inferior surface of 

 the head of the fifth metatarsal bone, from the transverse meta- 

 tarsal ligament ; insertion, into the first phalanx of the great toe, 

 on its outer side; action, adducts the great toe; nerve, the ex- 

 ternal plantar. 



Fourth Set. 



DORSAL INTEROSSEI. Four in number. Origin, by two 

 heads from the adjoining bases of the metatarsal bones; inser- 

 tion, into the bases of the first phalanges of the second, third, 

 and fourth toes, the second having two, one on either side, and 

 the third and fourth on their outer side ; action, abduct the toes 

 from the middle line of the second toe; nerve, external plantar. 



PLANTAR INTEROSSEI. Three in number. Origin, from 

 the bases of inner side of the third, fourth, and fifth metatarsal 

 bones ; insertion, into the bases of the first phalanges on the same 

 side; action, adduct the toes toward the middle line of the sec- 

 ond toe; nerve, the external plantar. 



THE FASCIAS. 



The fascias are strong, fibrous (fibro-areolar) investments 

 protecting and binding together the muscles, and in places form- 

 ing ligaments and intermuscular septa. They consist for the 

 most part of two layers, a superficial and a deep. 



FASCIAS OF THE HEAD AND FACE. The superficial fascia 

 of the head and face is everywhere intimately connected to the 

 skin, except over the temporal region, where it forms a distinct 

 lamina, inclosing the superficial temporal vessels and auricular 

 muscles. 



