OF THE MUSCLES OF THE LOWER EXTREMITY. 357 



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

 is often necessary, however, in compound fracture, to remove a portion of the projecting bone 

 with the saw before complete adapta- 

 tion can be effected. Fig. 204. Fracture of the Fibula, with Displacement 



Fracture of the fibula, with displace- of the Tibia. " Pott's Fracture. " 



tne.nt of the tibia (fig. 204), commonly 

 known as "Pott's Fracture," is one of 

 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 oc- 

 casionally that portion of the tibia 

 with which it is more directly connected 

 below; 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. 



For a detailed account of the Minute Anatomy of Muscle, reference should be made to the 

 following sources of information : Quain's " Elements of Anatomy." Kolliker's " Handbook of 

 Human Microscopic Anatomy," before alluded to. Todd'and Bowman's " Physiological Ana- 

 tomy." To the article, " Muscle and Muscular Motion," by W. Bowman, in the Cyclopedia of 

 Anatomy ; and " On the Minute Structure of Voluntary Muscle," by the same author, in the 

 Phil. Trans. 1840, 1841. 



On the Descriptive Anatomy of the Muscles, refer to Cruveilhier's "Anatomic Descriptive." 

 "Traite de Myologie et d'Angeiologie," by F. G. Theile, " 1'ncyclopedie Anatomique," Paris, 1843 ; 

 and Henle's "Handbuch der Systematischen Anatomic," before alluded to. 



