96 



ANATOMY. 



4 lesser toes, by 4 tendons which pass over the dorsum of the foot, from the 

 outer canal in the anterior annular ligament. Ac- 

 tion, to extend the lesser toes. Nerve, anterior tibial 



FIG. 50. 



Peroneus Tertius 6 (Flexor Tarsi Fibularis),/r<wz the. 

 outer lower one-fourth of the fibula, interosseous 

 membrane, and intermuscular septum, into the 

 base of the 5th metatarsal bone. This muscle is 

 a part of the last named, and passes through the 

 same canal in the annular ligament. Action, to 

 flex the tarsus. Nerve, anterior tibial. 



Gastrocnemius, by 2 heads from the condyles of 

 the femur, and the supra-condyloid ridges, unites 

 with the tendon of the soleus to form the tendo 

 Achillis, into the posterior tuberosity of the os calcis. 

 Action, to extend the foot. Nerve, internal popliteal. 



Soleus, from the head and upper one-half of the 

 shaft of the fibula posteriorly, the oblique line of 

 the tibia, and the tendinous arch, unites with the 

 tendon of the gastrocnemius as the tendo Achillis 

 (see above). Action, to extend the foot. Nerve, 

 internal popliteal. 



Plantaris, from the outer bifurcation of the linea 

 aspera, and posterior ligament of the knee-joint, 

 by a very long, delicate tendon, into the posterior 

 surface of the os calcis. Action, to extend the foot. 

 Nerve, internal popliteal. 



Popliteus, 6 /hwz a depression on the external condyle 

 of the femur, and the posterior ligament of the knee- 

 joint, into the inner two-thirds of the triangular surface on the shaft of 

 the tibia posteriorly and above the oblique line. Action, to flex the leg. 

 Nerve, internal popliteal. 



Flexor Longus Pollicis, 9 from the lower two-thirds of the shaft of the fibula 

 internally, the interosseous membrane, fascia, and intermuscular septum, 

 through grooves in the tibia, astragalus, and os calcis, into the base of the 

 last phalanx of the great toe. Action, to flex the great toe. Nerve, poste- 

 rior tibial. 



F'lexor Longus Digitorum, 7 from the shaft of the tibia posteriorly and 

 below the oblique line, and the intermuscular septum, passes behind the 

 inner malleolus in a groove 13 with the tibialis posticus, into the bases of 



