630 



DISSECTION OF THE LEG. 



drawing forwards the fibula when the leg is advanced to make a step in 

 walking. 



The ANTERIOR TIBJAL ARTERY (fig. 215, 4 ) extends from the bifurca- 

 tion of the popliteal trunk to the front of the ankle joint. At this spot it 

 becomes the dorsal artery of the foot. 



Fig. 215. 



ANTERIOR TIBIAL VESS-L AND MUSCLES (Quain's Arteries). 



1. Tibialus anticus muscle. 3. Part of anterior annular ligament. 



2. Extensor pollicis and extensor longus digi- 4. Anterior tibial artery: the nerve outside it 



torum drawn aside. is the anterior tibial. 



The course of the artery is forwards through the aperture in the upper 

 part of the interosseous membrane, along the front of that membrane, and 

 over the tibia to the foot. A line from the inner side of the head of the 

 fibula to the centre of the ankle will mark the position of the vessel. 



For a short distance (about two inches) the artery lies bstween the 



