110 OSTEOLOGY, OR ANATOMY OF OSSEOUS SYSTEM 



V 



The distal extremity of each bone articulates with the 

 corresponding proximal extremity of the first phalanx. 



Attachment of Muscles. 



First bone. Part of tibialis anticus, peroneus longus, and first dorsal 

 interosseous. 



Second bone. Adductor obliquus hallucis, first and second dorsal 

 interosseous, a slip from the tibialis posticus; occasion- 

 ally a slip from the peroneus longus. 



Third bone. Adductor obliquus hallucis, second and third dorsal 

 and first plantar interossei, and a slip from the tibialis 

 posticus. 



Fourth bone. Adductor obliquus hallucis, third and fourth dorsal 

 and second plantar interossei, and a slip from the 

 tibialis posticus. 



Fifth bone. Peroneus brevis, peroneus tertius, flexor brevis minimi 

 digiti, adductor transversus hallucis, fourth dorsal 

 and third plantar interossei. 



The Phalanges of the Foot 



The phalanges are fourteen in number for each foot, allowing 

 three (1st, 2d, and 3d) for the second, third, fourth, and fifth 

 toes; while the first has only two (1st and 2d). 



The first or proximal phalanx is long and thin and presents a 

 proximal extremity for articulation w r ith the metatarsal bone; 

 and a distal extremity for articulation with the second phalanx. 



The second phalanx is shorter and smaller and articulates 

 with the proximal and distal phalanges. 



The third or distal phalanx is still smaller, and more flattened 

 than the others, articulating by its proximal extremity with 

 the second phalanx, and its expanded dorsal extremity sup- 

 ports the nail and the end of the toe. 



Attachment of Muscles. To first phalanges: 



Great toe. Innermost tendon of extensor brevis digitorum, abductor 

 hallucis, adductor obliquus hallucis, flexor brevis 

 hallucis, adductor transversus hallucis. 



Second toe. First and second dorsal interossei; first lumbrical 



Third toe. Third dorsal and first plantar interossei: second lumbrical. 



Fourth toe. Fourth dorsal and second plantar interossei and third 

 lumbrical. 



Fifth toe. Flexor brevis minimi digiti, abductor minimi digiti, third 

 plantar interosseous, and fourth lumbrical. 



