192 



DISSECTION OF THE LEG. 



Deep part of 

 the fascia of 

 the leg. 



Clean the 

 deep 

 muscles ; 



dissect 



peroneal 



artery. 



the inner ankle and the heel are to- 

 be taken away to lay bare the annulan 

 ligament, but a cutaneous nerve to 

 the sole of the foot, which pierces 

 the ligament, is to be preserved. 



Deep part of the fascia. This inter- 

 muscular piece of the fascia of the 

 leg is fixed to the tibia and fibula, 

 and binds down the flexor muscles 

 of the deep group. In the upper 

 part of the leg it is thin and indis- 

 tinct ; but lower in the limb it is 

 much stronger, and is marked by 

 some transverse fibres near the mal- 

 leoli, which give it the appearance 

 and office of an annular ligament in 

 that situation. Inferiorly it joins 

 the internal annular ligament be- 

 tween the heel and the inner ankle. 



Dissection. The deep layer of 

 muscles, the posterior tibial nerve, 

 and the trunks and offsets of the pos- 

 terior tibial vessels will be laid bare 

 by the removal of the fascia and the 

 areolar tissue. A muscle between 

 the bones (tibialis posticus) is partly 

 concealed by an aponeurosis which 

 gives origin to the two lateral muscles 

 (flexor longus digitorum and flexor 

 hallucis) ; and it will not fully appear 

 until after its membranous covering 

 has been divided longitudinally and 

 reflected to the sides. 



To prepare the peroneal artery 



FIG. 74. DEEP DISSECTION OF THE BACK OF THE LEU (ILLUSTRATIONS 

 OF DISSECTIONS). 



Muscles : 



A. Popliteus. 



B. Outer, and c, inner part of 

 soleus, cut. 



D. Tibialis posticus. 



E. Flexor longus digitorum. 



F. Flexor longus hallucis. 



G. Peroneus longus. 

 H. Peroneus brevis. 

 i. Tendo Achillis. 



Arteries : 

 a. Popliteal. 



b. Inferior internal, and c, inferior 

 external articular. 



d. Anterior tibial. 



e. Posterior tibial, and _/, a com- 

 municating branch to peroneal. 



g. Peroneal. 



h. Continuation of peroneal to 

 outer side of the foot. 

 Nerves : 



1. Internal popliteal. 



2. Muscular branch cf posterior 

 tibial. 



3. Posterior tibial. 



4. Calcaneo-plantar. 



