THE ABDOMINAL WALLS. 117 



Metatarsal artery : 



Dorsal interosseous arteries. 

 Dorsal digital vessels. 

 Dorsalis hallucis: 



Dorsal digital branches. 

 Communicating. 



Anterior peroneal artery, 627; Fig. 380. (615) 

 Deep veins of the lower extremity, 683 and 685. (669 and 671) 

 Deep lymphatic vessels of the lower limb, 707. (691) 

 Peroneal Region. 



Turn off the deep fascia covering the peronei muscles, leave enough of the external annular ligament 

 to retain the tendons in place as they pass under it. 



External annular ligament, 391 and 1237. (388 and 1213) 



Muscles on the outer side of the leg, 415 ; Figs. 292, 297. (412) 



Peroneus longus, 415-16. (412-13) 



Origin. (Insertion.) Structure. Nerve-supply. Action. Relations. Vari- 

 ations. 



Peroneus brevis, 417. (413-14) 



Origin. (Insertion.) Structure. Nerve-supply. Action. Relations. Vari- 

 ations. 



External popliteal nerve, 859. (839) 

 Recurrent articular nerve. 

 Musculo-cutaneous nerve. 

 Anterior tibial nerve. 



Posterior Tibio-Fibular Region. 



Note the cutaneous nerve-supply, Fig. 464; P. 851. (831) 



Continue the median incision to the middle of the heel. Make a transverse incision from the internal 

 to the external malleolus, passing under the middle of the heel. Reflect the skin from the posterior 

 surface of the leg and from the posterior portion of the heel, exposing the superficial fascia, veins, and 

 nerves. 



Superficial veins of the lower limb, 683-5. (669-71) 



Branches of internal saphenous vein. 



The short or external saphenous vein. 

 Cutaneous nerves, Fig. 464; P. 851. (831) 



Posterior branch of the internal cutaneous nerve, 852. (832-3) 



Internal saphenous nerve, 852-3. (833) 



Internal calcanean or calcaneo-plantar cutaneous branch, 863. (843) 



Terminal branches of the small sciatic nerve, 856-7. (837-8) 



External or short saphenous nerve, varieties, 86 1. (841) 

 Deep fascia of the leg, 390. (388) 



Internal annular ligament, 391 and 1237. (388 and 1213) 



Divide the deep fascia in the median line and turn out and in from this incision ; preserve a portion of 

 the internal annular ligament. 



Gastrocnemius, 391-3; Fig. 291. (389) 



Origin: Outer head; inner head. Insertion. 

 Structure. Nerve-supply. Relations. Variations. 



Divide the gastrocnemius transversely about three inches above the tendo-Achillis and raise the upper 

 portion to expose the structures underneath. 



Plantaris, 393. (391) 



Origin. Insertion. Structure. Nerve-supply. Action. Relations. Variations. 

 Soleus, 394-5-6. (392-3) 



Origin. Insertion. Structure, tendo-Achillis (behind the ankle, 1235). (1210) 



Nerve-supply. Action. Variations. 



Divide the soleus transversely in the same manner as the gastrocnemius and raise to expose the struc- 

 tures underneath, then divide the upper portion of the muscle vertically in the median line, note the 

 tendinous arch of origin (3) between the tibia and fibula. 



