MYOLOGY. . 79 



tendon,34; 23, Perforans muscle, with its tendon, 35; 24. Flexor metatarsi; 25, An- 

 terior extensor of the phalanges, or extensor pedis; 26, Annular ligament; 27, Ten- 

 don of flexor metatarsi, and its cunean branch, 28; 29, Tendon of superficial flexor, 

 or internal gastrocnemius; 30, Tendon of gemelli or external gastrocnemius; 

 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. 



Origin. From front of femur between trochlea and external 

 condyle. 



Insertion. Front of superior extremity of principal metatarsal 

 and cuboid. 



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. 



GASTROCNEMII. 



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. 



Nerve. Great sciatic. 



SOLEUS. 



Origin. External tuberosity of tibia. 

 Insertion. Into tendon of preceding. 

 Action. As preceding. 

 Nerve. Great sciatic. 



FLEXOR SUBLIMIS DIGITORUM OR PERFORATUS. 



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. 



