THE TARSUS 



267 



The Body (corpus tali). The superior surface of the body presents, behind, a 

 smooth trochlear surface, the trochlea, for articulation with the tibia. The trochlea 

 is broader in front than behind, convex from before backward, slightly concave 

 from side to side: in front it is continuous with the upper surface of the neck of 

 the bone. 



For medial malleolus 



Head 

 Neck 



For lateral malleolus 

 For inferior transverse ligament 



Medial tubercle 

 Sulcus for Flexor hallucis longus 



Trochlea for tibia 

 Lateral tubercle 



FIG. 270. Left talus, from above. 



For plantar calcaneonavicular ligament 

 For navicular bone 



Anterior calcaneal articular surface 



Sulcus tali 



^Posterior calcaneal articular 

 surface 



Lateral tubercle 



Sulcus for Flexor hallucis longus 

 Middle calcaneal articular surface 

 FIG. 271. Left talus, from below. 



The inferior surface presents two articular areas, the posterior and middle cal- 

 ineal surfaces, separated from one another by a deep groove, the sulcus tali, 

 he groove runs obliquely forward and lateralward, becoming gradually broader 

 id deeper in front: in the articulated foot it lies above a similar groove upon 

 le upper surface of the calcaneus, and forms, with it, a canal (sinus tarsi) filled 



