OF THE MUSCLES OF THE LOWER EXTREMITY. 435 



extension from the knee and ankle, the fragments may be brought into apposition. It is often 

 neceessary, however, in compound fracture, to remove a portion of the projecting bone with the 

 saw before complete adaptation can be effected. 



Fracture of the fibula, ivith displace- 

 ment of the tibia (Fig. 271), commonly 271. Fracture of the Fibula, with displacement 

 known as " Pott's Fracture," is one of O f the Tibia. " Pott's Fracture." 



the most frequent injuries of the ankle- 

 joint. The end of the tibia is displaced 

 from the corresponding surface of the 

 astragalus ; the internal lateral ligament 

 is ruptured ; and the inner malleolus 

 projects inwards beneath the integu- 

 ment, which is tightly stretched over 

 it, and in danger of bursting. The 

 fibula is broken, usually from two to 

 three inches above the ankle, and occa- 

 sionally that portion of the tibia with 

 which it is more directly connected be- 

 low ; the foot is everted by the action 

 of the Peroneus Longus, its inner border 

 resting upon the ground, and, at the 

 same time, the heel is drawn up by 

 the muscles of the calf. This injury 

 may be at once reduced by flexing the 

 leg at right angles with the thigh, 

 which relaxes all the opposing muscles, 

 and by making slight extension from the 

 knee and ankle. 



On the Descriptive Anatomy of the Muscles, refer to Cruveilhier's " Anatomie Descriptive;" 

 " Traite" de Myologie et d'Angeiologie," by F. G. Thiele, Encyclopedic Anatomique, Paris, 

 1843 ; and Henle's " Handbuch der Systematischen Anatomie," before referred to. 



