THE MUSCLES OF THE LEG AND FOOT 



341 



with the principal tendon. (3) The deep head, the flexor hallucis (M. flexor 

 hallucis longus), is much the largest. It lies on the posterior surface of the tibia, 

 from the popliteal line outward and do^^^lward. The belly contains much tendi- 

 nous tissue, and terminates behind the distal end of the tibia on a strong round tc n- 



Shafl of femur 



Medial head of gastrocnemius 



Medial condyle of femur ^ 



Wedial femoro-tibial ligament ^. 

 Medial meniscus 

 Medial condyle of tibia 



Popliteus 

 Flesiir digitalis longus 



Flexor hcdlucis 



Pouch of joint capsule 



'Laler(d head of gaslrocnemius 

 Super lirial digital flexor 



Lateral condyle of femur 



|ij— Lateral femoro-tibiid ligament 

 Lateral condyle of tibia 



-Tibialis posterior 

 Lateral digital extensor 



- Tendon of gastrocnemius 

 Superficial flexor tendon 



Deep flexor tendon - 

 Tendon of flexor digitalis longus 



Fig. 298. — [Muscles of Right Leg of Horse, Deep Dissection; Posterior View. 



don. The latter receives the tendon of the tibialis posterior, descends in the tarsal 

 groove, bound down by the strong plantar annular ligament (Ligamentum lacini- 

 atum) and enveloped in a synovial sheath, receives the tendon of the medial head 

 below the hock, and, a little further down, the so-called check ligament (Caput 

 tendineimi). The tendon is partly cartilaginous where it plays over the fibular 



