ARTICULATIONS 



323 



ends of the leg bones are very firmly united together by an 

 interosseous and other ligaments which give the joint a certain 

 amount of elasticity or spring. They form a deep hollow 

 resembling a mortice. The upper part of the talus is received 

 into this cavity. 



Distal end of shaft of tibia 



Groove on medial 



malleolus for tendon of 



tibialis posterior 



Trochlear surface 

 of talus 



Deltoid 



id ligament j 



Fibrous sheath for tendon of 

 flexor hallucis longu 



Sustentaculum tali 

 Flexor hallucis longus tendon (cut) 



Posterior talo-calcanean 

 ligament 



Tibio-fibular interosseous 

 membrane 



Distal end of shaft of fibula 



Posterior ligament of lateral 

 malleolus (O.T. Posterior 

 inferior tibio-fibular ligament 

 Transverse inferior tibio-fibul 

 ligament 



Facet on astragalus for trans- 

 verse inferior tibio-fibular 

 ligament 



_ Posterior talo-fibular 

 ligament 



Calcaneo-fibular ligament 



Tuber calcanei 



FIG. 121. Ankle-joint dissected from behind with part of the Capsular 

 Ligament removed. 



The ligaments of the ankle-joint are : 



1. Capsula articularis. 



2. Ligamentum deltoideum. 



3. Ligamentum talofibulare anterius. 



4. Ligamentum talofibulare posterius. 



5. Ligamentum calcaneo-fibulare. 



Dissection. The remains of the transverse and laciniate ligaments, 

 together with the tendons which are in relation to the joint, should be 

 removed and the ligaments defined. The anterior and posterior parts of 

 the capsule should be first dissected. They may then be removed in 



