ANKLE JOINT 



419 



resembling a mortice and the upper part of the talus is 

 received into the cavity. 



Dissection. Remove the remains of the laciniate and trans- 

 verse ligaments and cut through and displace the tendons which 

 are in relation with the joint, but do not remove them. Then 



Distal end of shaft of tibia 



Groove on medial 



lalleolus for tendon of 



tibialis posterior 



Trochlcar surface 

 of talus 



Deltoid ligament \ 



Fibrous sheath for tendon of 

 flexor hallucis longus 



Sustentaculum tali 

 'lexor 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) 

 Distal ligament of the 

 lateral malleolus 

 Facet on talus for distal 

 inferior tibio-fibular 

 ligament 



Posterior talo-fibular 

 ligament 



Calcaneo-fibular ligament 



Posterior surface of calcaneus 



FIG. 193. -Ankle Joint dissected from behind, with part of the Articular 

 Capsule removed. 



endeavour to trace out the anastomoses between the arteries in 

 the neighbourhood of the joint, and if possible secure the twigs 

 from the tibial and deep peroneal nerves which supply the joint. 



The Arterial Anastomosis around the Ankle Joint. The 



arteries which anastomose around the ankle joint are: (i) 

 the malleolar branches of the anterior tibial artery, (2) the 

 perforating branch of the peroneal arteiy, (3) the terminal 

 part of the peroneal artery. All the vessels are very variable 



