DISSECTION OF THE LOWER EXTREMITY 173 



Make a drawing showing the structures exposed and their 

 exact relations at different levels. Pay especial attention to the 

 relations of the structures in the fossa retromalleolaris medialis. 



Laciniate (" Fringed") Ligament (Ligamentum laciniatum) (O. T. 

 Internal Annular Ligament). (Fig. 71.) 



Determine the different points of attachment of this fibrous 

 triangular lamina and the relation that they bear to the malleolus 

 medialis, the medial surface of the tuber calcanei, the medial 



FIG. 71. 



M. flexor digit, longus, 



M. flexor hallucis longus 



M. tibialis posterior, 



M. tibialis anterior. 



Lig. cruciat. cruris y 



. lai-iniatum 



I 



M. flexor hall, brevis 



Margo pedis medialis, showing the tendons of the muscles of the leg. (From Gegenbaur, Lehrb. 

 der Anat. des Mensch., Leipzig, 1899, 7 Aufl., Bd. i. p. 468, Fig. 340.) 



plantar aponeurosis, the abductor hallucis muscle, and the fascia 

 cruris. It covers the tendons of the tibialis posterior, the flexor 

 digitorum longus, and the flexor hallucis longus muscles, and 

 the posterior tibial vessels and nerves. Each of these struct im 

 runs within a special sheath. The tibialis posterior and 

 flexor digitorum longus are separated from each other by 

 fibrous septum which passes off from the deep surface of 

 ligament. The fibres constituting the septum pass beneath 

 tendons; one process, ascending, is attached to the 



