572 



A MANUAL OF ANATOMY 



which project between the astragalus and the tibia. It is also 

 prolonged into the inferior tibio-fibular articulation so as to line 

 the anterior and posterior ligaments of that joint. 



Tendinous Relations of the Ankle- Joint — Anterior. — From within 

 outwards these are the tibialis anticus, extensor proprius hallucis, 

 extensor longus digitorum, and peroneus tertius. External. — 

 Peroneus longus and peroneus brevis. Posterior. — From without 

 inwards these are the peroneus longus and peroneus brevis, tendo 

 Achillis and plantaris, with the intervention of a large amount of 

 fat, flexor longus hallucis, and flexor longus digitorum and tibialis 

 posticus. Internal. — ^Tibialis posticus. 



Posterior Inferior — 

 Tibio-fibular Lig. \^|^ 



Posterior Band of. 

 Ext. Lat. Lig. 



Middle Band of .^ 

 Ext. Lat. Lig. 



Peroneus Longus 



Peroneus Brevis 



Fig. 268. — Ligaments of the Right Inferior Tibio-fibular, Ankle, 

 Tarsal, and Taiiso-metatarsal Joints (External View). 



Arterial Supply.— The anterior tibial, external and internal 

 malleolar, anterior peroneal, posterior tibial, and posterior peroneal 

 arteries. 



Nerve-supply.— The posterior tibial, short saphenous, and external 

 division of the dorsahs pedis nerve, or the anterior tibial nerve 

 itself. 



Movements. — The chief movements at the ankle-joint are flexion and 

 extension. When, however, the foot is extended a certain amount of lateral 

 movement is allowed. The foot is said to be flexed when it is raised from the 

 ground towards the front of the leg, as in standing upon the heels, and it 

 is said to be extended when the hsel is raised towards the back of the leg. 



