

INTERTARSAL ARTICULATIONS 



355 



the articulation of the talus with the navicular. The movement which takes place in this joint 

 is more extensive than that in the other tarsal joints, and consists of a sort of rotation by means 

 of which the foot may be slightly flexed or extended, the sole being at the same time carried 

 medially (inverted) or laterally (everted). 



The Ligaments Connecting the Calcaneus and Navicular. Though the calcaneus 

 and navicular do not directly articulate, they are connected by two ligaments: 

 the calcaneonavicular part of the bifurcated, and the plantar calcaneonavicular. 



The calcaneonavicular part of the bifurcated ligament is described on page 354. 



Tendon peronceus 

 longus muscle 



-* Plantar tarsometatar. lig. 



Tendon tibialis anticus 

 muscle 



'Plantar cuneonavic. lig, 



~*~ Plantar cuboideonavic. 

 ligament 



~ Plantar calcaneonavic. 

 ligament 



Tendon tibialis posticus 

 ' muscle 



FIG. 358. Ligaments of the sole of the foot, with the tendons of the Peronseus longus, Tibialis posterior and Tibialis 



anterior muscles. (Quain.) 



The Plantar Calcaneonavicular Ligament (ligamentum calcaneonaviculare plantare; 

 inferior or internal calcaneonavicular ligament; calcaneonavicular ligament) (Figs. 

 354, 358) . The plantar calcaneonavicular ligament is a broad and thick band of 

 fibers, which connects the anterior margin of the sustentaculum tali of the calca- 

 neus to the plantar surface of the navicular. This ligament not only serves to 

 connect the calcaneus and navicular, but supports the head of the talus, forming 



