378 THE INFERIOR EXTREMITY 



flexor digitorum longus, and from the fascia which covers it. 

 In Fig. 152, p. 340, the compartment which it occupies 

 is shown in a diagrammatic manner, and the surfaces from 

 which it takes origin are indicated. Towards the distal 

 part of the leg the tibialis posterior inclines medially, 

 under cover of the flexor digitorum longus, and its strong 

 flattened tendon grooves the back of the medial malleolus 

 to the medial side of the tendon of that muscle. Proceed- 

 ing under cover of the ligamentum laciniatum, its tendon is 



Tibialis posterior 



Flexor digitorum longu 

 Posterior tibial artery / 

 and tibial nerve \ 

 Flexor hallucis longus 

 Tibialis posterior 

 Medial plantar nerve 

 Flexor digitorum longu 



Lateral plantar artery 



and nerve 



Medial plantar artery 

 Abductor hallucis 







Nerve to the Medial calcanean 



quadratus plantae _, vessels and nerve 



Abductor digiti qumti Q uadratus plantae 



FIG. 167. Dissection of the medial side of the Ankle, showing the relations 

 of the lig. laciniatum (O.T. internal annular lig. ). 



inserted into the tubercle of the navicular bone, and also, by 

 a number of slips, into certain of the tarsal and metatarsal 

 bones. Those slips will be dissected later. The tibialis 

 posterior is supplied by the tibial nerve. It is a plantar flexor 

 and an inverter of the foot. 



Ligamentum Laciniatum. The connections of this 

 thickened band of the deep fascia should now be carefully 

 re-examined. It bridges across the hollow between the 

 medial malleolus and the medial prominence of the calcaneus, 

 and is attached to both. It has already been shown that its 

 proximal border is continuous not only with the deep fascia 



