ANKLE-JOINT 



67 



The Posterior ligament is attached to the edges of the tibia 

 and astragalus, and receives some fibres from the external 

 malleolus. The transverse ligament of the inferior tibio-fibular 

 joint strengthens this aspect of the ankle-joint. The - liga- 

 ment on the external aspect of the joint is divided into three 

 parts : 



1. Anterior Part of the ligament from the anterior border of 

 the external malleolus to the astragalus in front of the articular 

 surface. 



.Anterior Inferior Tibio-fibular 

 Ligament 



Anterior Band of External 

 Lateral Ligament 



Posterior Inferior 

 Tibio-fibular Lig. 



Posterior Band of... 

 Ext. Lat. Lig. 



Middle Ban 

 iixt. Lat. Lig. 



Peroneus Longus [ 



Peroneus Brevis 



FIG. 22. ANKLE-JOINT. 



2. Middle Part of the ligament from the lower border of the 

 external malleolus to the external surface of the os calcis just 

 above the peroneal spine ; this is a strong rounded cord. 



:>. Posterior Part of the ligament from the fossa on the inner 

 surface of the external malleolus to the external tubercle on 

 the posterior surface of the astragalus ; this is the strongest of 

 the three parts. 



The Deltoid ligament is the one on the inner aspect of the 

 joint ; it is triangular in shape and attached by its apex to the 



