286 SURGICAL ANATOMY OF 



is the head of the astragalus ; immediately in front of 

 this is the articulation. (Malgaigne.) 



Structured Divided in Chopart's Amputation. Com- 

 mencing from the inner side, the anterior flap, that is, up 

 to the point of clisarticulation, will contain integument, 

 saphena vein, and musculo-cutaneous nerve, anterior an- 

 nular ligament, tendon of tibialis anticus, extensor pro- 

 prius pollicis, anterior tibial nerve and vessels, tendons 

 of common extensor and peroneus tertius, extensor brevis 

 digitorum, peroneus brevis and anterior ligaments of the 

 articulation ; the posterior flap should contain the poste- 

 rior ligaments of the articulation, the tendon of the tibi- 

 alis posticus, flexor longus digitorum and flexor longus 

 pollicis, some branches of the internal plantar nerve and 

 vessels, the abductor pollicis, the flexor accessorius, the 

 tendon of the peroneus longus, the abductor minimum 

 digiti, the flexor brevis digitorum, the external plantar 

 nerve and vessels, and the integument of the sole. 



Synovial Membranes of the Tarsus and Metatarsus. 

 There are four synovia! membranes in the articulations 

 of the tarsus namely, one for the posterior calcaneo-as- 

 tragaloid articulation, a second for the anterior calcaneo- 

 astragaloid and astragalo-scaphoid, a third for the calca- 

 neocuboid, and a fourth for the surfaces of the cuneiform 

 with the scaphoid, the cuneiform with each other, the 

 external cuneiform with the cuboid, and the middle and 

 outer cuneiform with the second and third metatarsal 

 bones. Between the internal cuneiform and the base of 

 the metatarsal bone of the great toe there is a single 

 sy no vial membrane, and there is another common to the 

 anterior surface of the cuboid, and the bases of the fourth 

 and fifth metatarsal bones. 



The arteries of the sole of the foot are the internal and 



