IVIYOLOGY. 79 



Flexor metatarsi; 25, Anterior extensor of the phalanges, or extensor pedis; 26, Annu- 

 lar ligament; 27, Tendon of flexor metatarsi, and its cunean branch, 28; 29, Tendon of 

 superficial flexor, or internal gastrocnemius; ^o, Tendon of gemelli or external gastro- 

 cnemius; 31, Os calcis; 32, Astragalus; 33, Perforatus tendon; 34, Tendon of oblique 

 flexor joining the perforans tendon, 35: 36, Large metatarsal bone; 37, Extensor pedis 

 tendon; 38, Terminal knob of small metatarsal bone. 



FLEXOR OF METATARSUS. 



(A) Tendinous Portion. 



Origiti. — From front of femur between trochlea and external 

 condyle. 



Inse7'tion. — Front of superior extremity of principal metatarsal 

 and caboid. 



Action. — Flexes metatarsus and hock joint. 



(B) Muscular Portion. 



Origin. — From tibia on sides of groove for tendinous portion. 

 Insertion. — In front of superior extremity of principal meta- 

 tarsal and second cuneiform bone. 

 Nerve. — Anterior tibial. 



GASTROCNEMIL 



Origin. — External head from above and behind external con- 

 dyle. Internal from internal condyle. 



Insertion. — Into posterior part of summit of os calcis after pass- 

 ing over a bursa. 



Action. — Extends foot on tibia. 



Nei-ve. — Great sciatic. 



SOLEUS. 



Origin. — External tuberosity of tibia. 

 Insertion. — Into tendon of preceding. 

 Action. — As preceding. 

 Ne7ve. — Great sciatic. 



FLEXOR SUBLIMIS DIGITORUM OR PERF0R.4TUS. 



Origin. — Above super-condyloid fossa of femur. 

 Insertion. — Into summit of os calcis and fibrous band of hock, 

 then spreads out on second phalanx. 



Action. — Flexes second phalanx and extends foot. 

 Nerve. — Plantar. 



