Joints of the Lower Extremity. 



219 



Ligamentum talotibiale anterius 



Ligamentum' tibionaviculare v 

 Lig. talonaviculare [dorsale] 



Ligamentum deltoideum 



Ligamentum 

 talotibiale posterius 



Ligamenta naviculari- 

 cuneiformia dorsalia 



Ligamentum calcaneotibiale 



Ligamentum 

 talocalcaneum posterius 

 Loop for the attachment of the 

 tendon of the m. flexor hallucis 

 longus in the sul- 

 cus in. flexoris 

 hallucis longi 



Lig. navicularicuneiforme plantare 



Ligamentum calcaneonaviculare plantare 



Ligamentum plantare longum | 



Ligamentum talocalcaneum mediale 



265. Joints of the right foot, arliculationes pedis, 



from the medial surface. 

 (The specimen has heen prepared as for Fig. 264.) 



Articulatio talocruralis (continued). The ligamentum deltoideum (0. T. deltoid 

 or internal lateral ligament -f- the anterior and posterior tibiotarsal ligaments) is an unequal-sided 

 quadrangular ligamentous mass which has a narrow origin on the medial surface of the malleolus 

 medialis [tibiae] and has a broad attachment to the talus, calcaneus and os naviculare. This 

 ligament is composed of several layers and is divisible, according to the lower attachment of its 

 fibres, into the ligamenta talotibialia, the ligamentum calcaneotibiale and the Ligamentum, tibio- 

 naviculare. The ligamentum talotibiale posterius (0. T. posterior tibiotarsal ligament) (see also 

 Fig. 263) is a thick, broad band of fibres which arises behind the tip of the malleolus medialis 

 and is attached to the talus close behind and below the facies malleolaris medialis of the trochlea, 

 in front of the medial projection of the processus posterior tali. The ligamentum talotibiale 

 anterius (0. T. anterior tibiotarsal ligament) for the most part hidden below the ligamenta cal- 

 caneotibiale and tibionaviculare, is short and narrow and goes off from the tip of the malleolus 

 medialis in front of the preceding and has a somewhat broad attachment below the anterior 

 portion of the facies malleolaris medialis of the trochlea tali. The ligamentum calcaneotibiale 

 (0. T. internal lateral ligament) (see also Fig. 263), the most superficial part of the ligamentum 

 deltoideum, has a broad origin on the medial surface of the malleolus medialis and runs downward 

 to the posterior margin of the sustentaculum tali of the calcaneus. The ligamentum tibionaviculare 

 has a broad attachment to the medial surface of the malleolus medialis just above the ligamentum 

 talotibiale anterius and, broadening, goes to the dorsal and medial surface of the os naviculare as 

 well as to the medial margin of the ligamentum calcaneonaviculare plantare ; at its origin and be- 

 hind it is partially hidden beneath the ligamentum calcaneotibiale. The ligamenta talotibiale poste- 

 rius and calcaneotibiale form, medianward, a groove for the tendon of the m. tibialis posterior. 



