A MANUAL OF ANATOMY 



The posterior ligament is weaker and less defined than the 

 anterior. Superiorly it is attached from without inwards to the 

 posterior aspect of the external malleolus internal to the peroneal 

 groove, posterior inferior tibio-fibular ligament, and posterior 

 border of the tibia as far inwards as the groove behind the internal 

 malleolus. Inferiorly it is attached to the upper aspect of the 

 posterior border of the astragalus immediately behind the superior 

 articular surface, where it extends between the posterior fasciculus 

 of the external lateral ligament and the internal lateral hgament. 

 Its fibres are disposed obliquely, and radiate in an inward direction 

 from the external malleolus. 



- -Interosseous Membrane 



Internal Malleolus - 



Astragalus - 



Internal Lateral Ligament- 



Groove for Flexor. 

 Longus Hallucis 



Int. Astragalo-calcaneal 

 Ligament 



Tuber Calcis 



Posterior Tibio-fibular 

 Ligament 



-External Malleolus 



Posterior Band of External 

 Lateral Ligament 



Ext. Astragalo-calcaneal 



Ligament 



Middle Band of External 



Lateral Ligament 



Fig. 266. — The Right Ankle-Joint (Posterior View). 

 (The Posterior Ligament has been removed.) 



The internal lateral ligament is also known as the deltoid 



ligament. It is a strong, flat, triangular structure, which is 

 attached superiorly to the lower border, tip, and anterior border of 

 the internal malleolus, in which latter situation it is superficial to 

 the fibres of the anterior ligament. A strong bundle of fibres 

 springs from the notch which indents the lower border of the internal 

 malleolus. From the superior attachment the fibres diverge in a 

 radiating manner. The posterior fibres, strong and short, descend 

 with an inclination backwards to be attached to the rough, de- 

 pressed inner surface of the astragalus below the internal facet, 

 where they extend as far back as the inner tubercle on the posterior 

 border of the bone. The anterior part of the ligament, somewhat 

 thinner and more radiating than the jjosterior, is attached to 



