BY CHARLES W. DE VIS, B.A. 315 



Extensor longus (fig. 7 — e. 1. d.(— Tendinous from the outer side 

 of the fore aspect of the head of the tibia; — forms a slender muscle 

 dividing its tendon over the base of the middle metatarsal. Each 

 tendon passes between the metatarsals to the plantar surface of the 

 middle one, and runs forward beneath it to an insertion at about 

 three-fourths of its length. In the other foot the tendon undivided 

 passes down the peroneal side of the metatarsal. 



Extensor brevis (fig. 7 — e. b. d.) — 1st. From the peronseal side 

 of the lower end of the fibula passes obliquely as a broad slip to the 

 dorsum of the hallux. 



2nd. Rises inseparably from No. 1 ; — inserted into the dorsum of 

 the index. In the other foot this rises by tendon from the upper 

 fibular side of the base of the first (hallux) metatarsal. 



3rd. By a strong tendon from a depression in the middle of the 

 upper surface of the astragalus ; — insertion into the dorsum of the 

 third digit. 



4th. From the base of the fourth metatarsal ; — inserted into the 

 dorsum. 



5th. By a strong tendon fro/n the inner side of the outer 

 tuberosity of the calcaneum ; — it passes without adhesion over the 

 dorsum of the fourth metacarpal, and is inserted into the base of 

 the proximal phalanx. 



6 th. Extensor projprius quarti digiti. — Fleshy from the fibular 

 side of the base of the fourth metatarsal ; — sends a long tendon to 

 the upper and outer side of its terminal phalanx. 



Extensor accessorius. — Two fascicles rising together from the 

 outer side of the anterior tuberosity of the calcaneum send a long 

 tendon along the outer side of each of the third and fourth digits 

 to the terminal phalanges. 



Poplitceus (fig. 7 — p. p.) — From the tibial side of the head of the 

 fibula ; inserted into the posterior side of the upper fourth of the 

 tibia. 



Tibialis posticus (fig. 7 — t. p.) — From the lower two thirds of 

 the hinder surface of the fibula ; ends in a carneotendinous expan- 

 sion investing the ends of the tibia and fibula. 



