DISSECTION OF THE DOG 93 



Dissection.—Attention should now be directed to the structures behind 

 the tibia. The disposition and strength of the fascia over this part of 

 the leg calls for remark. In the proximal third of the leg, where the 



- m. vastus lateralis 



n. ischiadicus-^^ 



n. tibialis - 



m. semitendiTwsus — "^ 

 a. ferrwris posterior^- 



n. cutaneus surce medialis 



m. gastrocnemius 

 caput mediale - 



m, flexor di/iitonim 

 profundus 



m. adductor 



■ m. semimembranosus 



— a. femoralis 



a. poplUea 



_ _ n. peroncEiis 

 communis 



m. popliteus 



a. tibidlis anterior 



n. peronosus profundus 



7n, tibialis anterior 



„_ m. extensor digilnrum 



longus 



' — m. extensor digiti quinti 

 . n. peronosus superflcialis 



FiGf. 37. — Dissection of origin of tibial and common peroneal nerves, 



calf muscles are covered by the hamstring muscles, the fascia is not notably- 

 strong ; but in the distal half of the region it is thick, strong and tendinous, 

 especially over the tendo-calcaneus [Achillis] (the combined tendons of 

 gastrocnemius and plantaris muscles). In front of the tendon there is 

 a thick tendinous cord inserted into the calcaneus. 

 The small saphenous vein may be again examined and its termination 

 noted. Examine the cutaneous nerves of the region. 



