214 THE ARTISTIC ANATOMY OF ANIMALS 



there are no muscles which belong exclusively to it ; for it 

 is in great measure formed by the internal surface of the 

 tibia, which, as in man, is subcutaneous. 



Muscles of the Anterior Region 



We first note that in the human species the tibialis 

 anticus, extensor proprius pollicis, extensor longus digitorum 



Fig. 83. — Myology of the Horse : the Anterior Tibial Muscle 

 (Flexor of the Metatarsus), Left Leg, Anterior View. 



I, Femoral trochlea; 2, tibia; 3, tendinous portion of the tibialis 

 anticus; 4, cuboid branch of same ; 5, 5, its metatarsal branch; 6, fleshy- 

 portion ; 7, cuneiform branch of its tendon ; 8, metatarsal branch of 

 the same tendon ; 9, extensor longus digitorum (anterior extensor of 

 the phalanges turned outwards) ; 10, peroneus brevis (lateral extensor 

 of the phalanges). 



and the peroneous tertius or anticus, form the subcutaneous 

 layer of this region. We now proceed to study these muscles 

 in quadrupeds. 



Tibialis Anticus (Fig. 83 ; Fig. 84, 6; Fig. 85, 4; Fig. ^y, 10 ; 

 Fig. 88, 10, 11). — It is further named by veterinarians the 

 flexor of the metatarsus. 



