44 



FIBULA. 



tibialis anticus and extensor communis digitorum ; from the posterior 

 surface arise the tibialis anticus, and flexor communis digitorum. 



The anterior edge* (Fig. 27) is sharp and superficial, generally 

 curved with some resemblance to the italic/,- the external has a 

 ridge for the attachment of the interosseous ligament, and the in- 



Fig. 27. 



Fig. 28. 



teriial is rounded, having the sartorius, gracilis, and semi-tendinosus 

 inserted into it at its upper -jjart. 



The inferior extremity is smaller than the superior, and four- 

 sided. Over the aiiterior surface pass the extensor tendons ; poste- 

 riorly is a slight fossa^ (Fig. 28) for the tendon of the flexor longus 

 poUicis ; externally^ is a rough triangular fossa for the articulation 

 of the fibula ; and internally is a large process, called the inter- 

 nal malleolus^ (Fig. 28), behind which is an oblique fossa, trans- 

 mitting the tendons of the tibialis posticus. The inferior extre- 

 mity of the malleolus is notched for the attachment of the internal 

 lateral ligament ; its internal surface is superficial ; its external sur- 

 face is continuous with the quadrangular concavity at the extremity 

 of the bone, for the articulation of the astragalus. 



FIBULA. 



The fibula is a long thin bone placed upon the outside of the leg, 



