168 PRACTICAL ANATOMY. 



Two SEMILUNAR CARTILAGES. Flat below, have con- 

 cavities above for condyles, attached to crucial 

 and coronary ligaments and head of tibia. 



CORONARY. Serves to attach the semilunar cartilages 

 to tibia. 



TRANSVERSE. Passes across anteriorly from the inner 

 to the outer semilunar cartilage. 



LIGAMENTUM MucosuM. A triangular prolongation of 

 synovial membrane behind the patella. 



LIGAMENTA ALARiA. The lateral borders of liga- 

 mentum mucosum ; attached to the patella. 



TIBIO-FIBULAR ARTICULATIONS. 

 ABOVE: 



ANTERIOR. Head of tibia to head of fibula. 

 POSTERIOR. Head of tibia to head of fibula. 

 INTEROSSEOUS. Extends between the tibia and fibula 

 for the entire length. Is perforated above for the 

 anterior tibial artery. 

 BELOW : 



INFERIOR INTEROSSEOUS. Fibres passing between the 



tibia and fibula. 

 TRANSVERSE. From external malleolus ; attached 



above internal malleolus. 



ANTERIOR. Between the tibia and fibula anteriorly. 

 POSTERIOR. Between the tibia and fibula posteriorly. 



ANKLE-JOINT. 

 LIGAMENTS : 

 ANTERIOR. 



Origin Anterior inferior surface of tibia. 

 Insertion Neck of astragalus. 

 EXTERNAL LATERAL (3 bundles). 

 Origin External malleolus. 



Insertion 1. Outer side of astragalus. 2. Outer side 

 of os calcis. 3. Posterior part of astragalus. 



