94 MUSCLES OF THE LEG. 



Extensor Longus Digitorum Pedis.* — Origin^ from the head of 

 the fibula, from the head of the tibia, and from a portion of the 

 interosseous ligament, and edge of the fibula. Insertion^ by four 

 tendons into the phalanges of the toes. 



Peroneus Tertiics.^ — Origin., from the anterior angle of the fibula, 

 below its middle. Lisertion, into the upper surface of the base of 

 the metatarsal bone of the little toe. It looks like a portion of the 

 last-named muscle. 



Extensor Proprius Pollicis Pedis,^ — Origin, from the lower two- 

 thirds of the fibula and interosseous ligament. Insertion, into the 

 bases of the first and second phalanges of the great toe. Use ; it 

 extends the great toe. 



Peroneus Longus."^ — Origin, from the head and upper third of 

 the outer side of the fibula. Insertion, into the base of the meta- 

 tarsal bone of the great toe. Use ; it extends the foot and inclines 

 the sole outwards. 



Peroneus Brevis.^ — Origin, from the lower two-thirds of the 

 outer surface of the fibula. Insertion, into the base of the meta- 

 tarsal bone of the little toe. Use ; it extends the foot. 



Gastrocnemius. — Origin, by two heads from the condyles of the 

 femur. Insertion, by the tendo Achillis into the tuberosity of the 

 OS calcis. 



Soleus. — Origin, from two-thirds of the posterior part of the 

 fibula, and the middle third of the tibia. Insertion, into the tendo 

 Achillis. 



Plantaris. — This muscle has the longest tendon in the body. 

 Origin, just above the external condyle of the femur. Insertion, 

 into the os calcis before the te7ido Achillis. These last three 

 muscles form the calf of the leg, and are called the triceps sura. 



Popliteus^ (Fig- "^S)- — Origin, from behind the external condyle 

 of the femur. Insertion, into an oblique ridge of the tibia, below its 

 head. Use ; it bends the leg and rolls it inwards. 



Flexor Longus Digitorum Pedis Per/or ans.'' — Origin, from the 

 back of the tibia below its oblique ridge. Insertion, by four tendons, 

 which perforate the split tendons of the flexor brevis, into the bases 

 of the third phalanges of the four lesser toes. Use; it flexes the 

 toes. 



Flexor Longus Pollicis Pedis? — Origin, from the lower two- 

 thirds of the posterior face of the fibula. Insertion, into the second 

 phalanx of the great toe. Use; it flexes the great toe. 



libialis Posticus.^ — Origin, by two heads from the tibia and 

 fibula, and from the interosseous ligament. Insertion, into the 

 tuberosity of the scaphoid bone. Use ; it extends the foot. 



