222 



Joints of the Lower Extremity. 



Ligamentum cuboideonaviculare dorsale 



Os naviculare ^, 



"j 



Ligamentum calcaneo-^ 

 naviculare plantare \" 



Fibrocartilago 

 navicularis 



Facies articulares anterior 

 et media calcanei 



Sustentaculum tali 



Pars calcaneo-j 

 navicularis [ mi 



Pars calcaneo-f bifurcati 

 cuboidea 



Os cuboideum 



Ligamentum 

 calcaneocuboideum dorsale 



Ligamentum talo- 

 calcaneum laterale 



Ligamentum talocal- 

 caneum interosseum 



Ligamentum talo- 

 calcaneum anterius 



cut through 



close to 

 attachment 



Facies articularis posterior 

 calcanei 



f'alcaneus 



267. Joints of the right foot, articulationes pectis, 



viewed from the back of the foot. 



(The talus has been removed as have also the cuneiform bones and the nietacarpal bones, the 

 capsulae articulares have been removed except for the strengthening ligaments.) 



Articulationes intertarseae (continued). 



The talus is moveably united with the caleaneus and with the os naviculare with constant 

 formation of two separate joint cavities (see also Fig. 271). The posterior joint cavity is 

 situated between the facies articularis calcanea posterior of the talus and the fades articularis 

 posterior of the caleaneus; this union is called the articulatio talocalcanea; its caftsuia 

 articularis goes off from the bone usually near the margins of the cartilaginous surfaces: the 

 strengthening ligaments belonging here are the ligamenta talocalcanea posterius, anterius et 

 mediale (see p. 221). The anterior joint cavity lies between the facies articulares calcanea e 

 media et anterior of the talus and the facies articulares media et anterior of the caleaneus 

 as well as between the facies articularis navicularis of the talus and the proximal joint surface 

 of the os naviculare; besides, the joint concavity is made still more complete for the caput tali 

 by means of the ligamentum calcaneonaviculare plantare (see p. 224) and the fibrocartilago 

 navicularis enclosed in this, as well as by the pars calcaneonavicularis ligamenti bifurcati (see 

 p. 221); this anterior joint union is known as the articulatio talocalcaueoiiavicularis; 

 its most anterior portion is also known separately as the articulatio talonaviciilaris ; its 

 capsula articularis leaves the bones for the most part near the margins of the cartilaginous 

 surfaces; lying close upon the capsule, as a strengthening ligament of the same, is the liga- 

 mentum talonaviculare [dorsale] (see p. 221) while the ligamenta talocalcanea laterale et inter- 

 osseum (see p. 221) are separated from it by masses of fat; in addition, the ligamentum 

 calcaneonaviculare plantare and the pars calcaneonavicularis ligamenti bifurcati have to be 

 designated as strengthening ligaments. 



