THE LEG 



285 



knee. There it will be observed to be M - semimembranosus 

 continuous with the tendon of the semi- 

 membranosus, and through it, therefore, 

 the semimembranosus may be regarded 

 as having an insertion into the linea 

 poplitea of the tibia. 



The flexor halluris longus is 

 placed upon the posterior aspect 

 of the fibula, and its tendon 

 will be noticed grooving the 

 posterior border of the talus as 

 it passes forwards to gain the 

 sole of the foot. The flexor 

 digitorum longus lies upon the 

 tibia. The tibialis posterior rests 

 upon the interosseous membrane 

 upon a deeper plane and between 

 the fleshy bellies of the two 

 flexors. 



Aponeurosis covering the 

 Tibialis Posterior. This con- 

 stitutes the second partition which 

 crosses the posterior osteo-fascial 

 compartment of the leg. It is a 

 strong aponeurosis, which is at- 

 tached on the one hand to the 

 medial border of the fibula, and 

 on the other to the vertical ridge 

 which descends from the linea 

 poplitea on the posterior surface 

 of the tibia. To demonstrate 

 these attachments, the flexor 

 muscle of the toes must be pushed 

 medially and some of its fibres 

 divided. The flexor hallucis 

 longus must in like manner be 

 pushed laterally. The aponeur- 

 osis will then be seen to serve as 

 a surface of origin for both of FlG - 104. Posterior aspect of 

 these muscles; and, on its removal, Bon f f of A/T Le f with ^ ttach - 



ments of Muscles mapped out. 



it will also be observed to give 



fibres, by its deep surface, to the subjacent tibialis posterior. 

 M. Popliteus. The popliteus muscle arises by a stout 



Groove for M. tibialis 



posti 

 Groove for M. fl 



enor 



exor hallucis longus 



