. The comparative anatomy of the domesticated animals. Veterinary anatomy. MUSCLES OF THE POSTERIOR LIMBS. 375 2. External Kkgion (Fig. 206). This region is only composed of two muscles : the long and short peroneus. The first, which does not exist in Solipeds, is a penniform muscle attached to the upper third of the fibula, the external tuberosity of the tibia, and the internal face of the tibial aponeurosis, by the superior extremities of its muscular fibres. The flat tendon which termi- nates it is fixed to the outer portion of the base of the first metatarsal. The second corresponds to the
. The comparative anatomy of the domesticated animals. Veterinary anatomy. MUSCLES OF THE POSTERIOR LIMBS. 375 2. External Kkgion (Fig. 206). This region is only composed of two muscles : the long and short peroneus. The first, which does not exist in Solipeds, is a penniform muscle attached to the upper third of the fibula, the external tuberosity of the tibia, and the internal face of the tibial aponeurosis, by the superior extremities of its muscular fibres. The flat tendon which termi- nates it is fixed to the outer portion of the base of the first metatarsal. The second corresponds to the lateral extensor of the phalanges of the Horse, and is found Fig. 206. Fi^. ,5 SUPERFICIAL POSTERIOR MUSCLES OF THE HUMAN LEG. 1, Biceps forming outer ham-string; 2, ten- dons forming ianer ham-string; 3, popli- teal space ; 4, gastrocnemius ; 5, 5, soleus; 6, tendo-Achilles ; 7, posterior tuberosity of OS calcis ; 8, tendons of peroneus longus and brevis passing behind the outer ankle ; 9, tendons of tibialis posticus and flexor longus digitorum passing into the foot behind the inner ankle. OF THE HUMAN LEG (ANTERIOR TIBIAL REGION). 1, Quadriceps extensor inserted into the pa- tella (the figure is on the tendon of the rectus, the vastus internus and externus being on each side); 2, subcutaneous sur- face of the tibia ; 3, tibialis anticus; 4, extensor longus digitorum; 5, extensor proprius pollicis ; 6, peroneus tertius; 7, peroneus longus; 8, peroneus brevis; 9, 9, borders of the soleus muscle; 10, part of the inner belly of the gastrocnemius ; 11, extensor brevis digitorum (the tendon in front of the cipher is that of the peroneus tertius; that behind it, the peroneus brevis). in all animals. It is penniform, and is attached above, by its fleshy fibres, to the lower two- thirds of the external face of the fibula; below, by its tendon, to the upper extremity of the fifth metatarsal. These two muscles determine very complicated movements in the region of the foot 3. Pos
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