THE LIMBS OF THE HOESE 135 



muscle, by dividing into two vessels of unequal size, the anterior and 

 posterior tibial arteries. 



The collateral branches ;;of the popliteal artery are small, and dis- 

 tributed to the joint and the adjacent muscles. 



V. POPLITEA.— The popliteal vein lies medial to the artery of which 

 it is a satellite. 



Lig. cruciatum posterius 



M. popliteus. _ 



Lig. cruciatum anteiiUB. 



M. flexor digitorum lungus. 



- il. tibialis posterior. 



-Lis. collaterale 

 fibulare. 



^ M. flexor haliucis 

 longus. 



Fig. 91. — Posterior Aspect of the Tibia and Fibula, with Areas of Muscular and 

 Ligamentous Attachment. 



1 and 2 = Areas of attachment of ligamentous bands of the medial and lateral 

 menisci respectively. 



A. TIBIALIS POSTERIOR. — The posterior tibial artery is the smaller 



of the two vessels into which the popliteal divides. At first it lies 



between the popliteus muscle and the tibia, and afterwards between 



the flexor haliucis longus and the flexor digitorum longus. As far as 



the middle of the tibia the artery is deep-seated, but, following the 



posterior border of the tendon of the long flexor of the digit, it becomes 



more superficial as the distal end of the tibia is approached. About 



the level of the summit of the tuber calcanei the vessel ends by 



dividing into the lateral and medial tarsal arteries. 

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