626 A MANUAL OF ANATOMY. 



rent, below ; and the internal inferior articular across the 

 front of the knee. (c) The superior internal articular. 

 Arises from the popliteal opposite the external articular. 

 It runs inward along the insertion of the inner head of the 

 gastrocnemius, then under (in front of) the tendons of the 

 inner ham-string and adductor magnus muscles to the front 

 of the upper part of the knee and here anastomoses with 

 the deep branch of the anastomotica magna, above ; the 

 superior external articular, across the front of the knee ; and 

 the inferior internal articular, below, (d) The inferior 

 internal articular. Takes a course downward and in- 

 ward under (in front of) the inner head of the gastroc- 

 nemius muscle, lying upon the popliteus muscle, then 

 passes between the internal lateral ligament and the tibia, 

 to the front of the lower part of the joint. Here it 

 ends in branches which anastomose with the inferior 

 external articular, over the front of the tibia ; and the 

 superior internal articular, and superficial branch of the 

 anastomotica magna above. (e) The azygos articular. 

 This comes off the front of the popliteal, at the middle 

 of the back of the knee and passes directly forward into 

 the joint. 



The arterial anastomosis about the knee joint is arranged 

 in a superficial and deep system. The former lying between 

 the integument and fascia and the latter close to the bones. 



DISSECTION. 



Divide the tendon of the plantaris and tendo-Achillis near their insertion 

 and cut the soleus away from its tibial origin. 



Turn the muscles outward. Clean the deep layer of muscles, and the 

 vessels and nerves. 



Inasmuch as the deep muscles of the leg pass to their 

 insertion into the foot this part of them has not been dis- 

 sected out at present. 



