OF THE FOOT. 



447 



posticus, which is attached to that bone. The muscle divides, in front, into 

 two portions, which are inserted into the inner and outer sides of the base of the 

 first phalanx of the great toe, a sesamoid bone being developed in each tendon 

 at its insertion. The inner portion of this 

 muscle is blended with the Abductor 

 hallucis previous to its insertion, the 

 outer with the Adductor obliquus hallu- 

 cis, and the tendon of the Flexor 

 longus hallucis lies in a groove between 

 them. 



Relations. By its superficial surface, 

 with the Abductor hallucis and the ten- 

 don of the Flexor longus hallucis ; by its 

 deep surface, with the tendon of the Per- 

 oneus longus and metatarsal bone of the 

 great toe ; by its inner border, with the 

 Abductor hallucis ; by its outer border, 

 with the Adductor obliquus hallucis. 



The Adductor obliquus hallucis is a 

 large, thick, fleshy mass passing obliquely 

 across the foot and occupying the hollow 

 space between the four inner metatarsal 

 bones. It arises from the tarsal extrem- 

 ities of the second, third and fourth met- 

 atarsal bones, and from the sheath of the 

 tendon of the Peroneus longus, and is 

 inserted, together with the outer portion 

 of the Flexor brevis hallucis, into the 

 outer side of the base of the first phalanx 

 of the great toe. 



The small muscles of the great toe, 

 the Abductor, Flexor brevis, Adductor 

 obliquus, and Adductor transversus, like 

 the similar muscles of the thumb, give 

 off fibrous expansions, at their inser- 

 tions, to blend with the long Extensor 

 tendon. 



The Flexor brevis minimi digiti lies 

 on the metatarsal bone of the little toe, 

 and much resembles one of the Interossei. 

 It arises from the base of the metatarsal 

 bone of the little toe, and from the sheath 

 of the Peroneus longus ; its tendon is 

 inserted into the base of the first phalanx of the little toe on its outer side. 

 Occasionally some of the deeper fibres of the muscle are inserted into the outer part 

 of the distal half of the fifth metatarsal bone; these are described by some as a 

 distinct muscle, the Opponens minimi digiti. 



Relations. By its superficial surface, with the plantar fascia and tendon of 

 the Abductor minimi digiti ; by its deep surface, with the fifth metatarsal bone. 



The Adductor transversus hallucis ( Transversus pedis~) is a narrow, flat, muscular 

 fasciculus, stretched transversely across the heads of the metatarsal bones, between 

 them and the flexor tendons. It arises from the inferior metatarso-phalangeal 

 ligaments of the three outer toes, sometimes only from the third and fourth and 

 from the transverse ligament of the metatarsus ; and is inserted into the outer side 

 of the first phalanx of the great toe, its fibres being blended with the tendon of 

 insertion of the Adductor obliquus hallucis. 



Relations. By its superficial surface, with the tendons of the long and short 

 Flexors and Lumbricales ; by its deep surface, with the Interossei. 



FIG. 263. Muscles of the sole of the foot. Third 

 layer. 



