258 



OSTEOLOGY 



Articular 

 capsule 



Articular 

 capsule 



Styloid 

 process 



bifurcates below, to form the boundaries of a triangular rough surface, for the 

 attachment of the interosseous ligament connecting the tibia and fibula. 



Surfaces. The medial surface 

 is smooth, convex, and broader 

 above than below; its upper 

 third, directed forward and 

 medial ward, is covered by the 

 aponeurosis derived from the 

 tendon of the Sartorius, and by 

 the tendons of the Gracilis and 

 Semitendinosus, all of which 

 are inserted nearly as far for- 

 ward as the anterior crest; in 

 the rest of its extent it is sub- 

 cutaneous. 



The lateral surface is narrower 

 than the medial ; its upper two- 

 thirds present a shallow r groove 

 for the origin of the Tibialis 

 anterior; its lower third is 

 smooth, convex, curves grad- 

 ually forward to the anterior 

 aspect of the bone, and is 

 covered by the tendons of the 

 Tibialis anterior, Extensor hal- 

 lucis longus, and Extensor digi- 

 torum longus, arranged in this 

 order from the medial side. 



The posterior surface (Fig. 259) 

 presents, at its upper part, a 

 prominent ridge, the popliteal 

 line, which extemis obliquely 

 downward from the back part of 

 the articular facet for the fibula 

 to the medial border, at the 

 junction of its upper and middle 

 thirds; it marks the lower limit 

 of the insertion of the Popliteus, 

 serves for the attachment of the 

 fascia covering this muscle, and 

 gives origin to part of the 

 Soleus, Flexor digitorum longus, 

 and Tibialis posterior. The 

 triangular area, above this line, 

 gives insertion to the Popliteus. 

 The middle third of the poste- 

 rior surface is divided by a ver- 

 tical ridge into two parts; the 

 ridge begins at the popliteal line 

 and is well-marked above, but 

 indistinct below; the medial and 

 broader portion gives origin to 

 the Flexor digitorum longus, 



Articular capsule 

 259. Bones of the right leg. Posterior surface. 



the lateral and narrower to part 

 of the Tibialis posterior. The 



