The Lower Extremity and Pelvis 

 TIBIA AND FIBULA, 



155 



Long bones firmly fastened together and forming, with the interosseous membrane 

 stretched between them, the skeleton of the leg and surfaces of attachment for its 

 muscles. The tibia is the inner and larger bone and articulates with the femur above, 



outer 



groew far F. lony. hill- fej 



FRONT vim. 



groov? for . 



Titalit pott kxdtn 



SACK view. 



FIG. 1.28. Right tibia. Anterior and posterior surfaces. A, area 

 supporting fatty pad and bursa under cover of patellar tendon and 

 capsule ; B. surface covered by Tibialis anticus ; C. lower part of 

 outer surface looking more forward and supporting all the extensor 

 tendons, etc. ; D. surface covered only by superficial fascia and 

 skin ; E. covered by Popliteus ; F. for Tibialis posticus ; G. area 

 covered by Flexor long. dig. ; H. area in relation with all the 

 structures going behind inner ankle. 



but both bones articulate with the astragalus to form the ankle, although the tibia 

 alone carries the weigh't directly to the upper surface of the astragalus. 



TIBIA. (Fig. 128). 



The upper end, or head, is expanded to carry the condyles of the femur, and presents 

 on its upper surface corresponding inner and outer articular surfaces : these are separated 

 by an intervening non-articular area, in the middle of which is a prominent spine, 



