Chap, xxiii.j NERVES OF LOWER LIMB. 



537 



metatarsal bone, which is deeply lodged between the 

 tarsal segments. The chief bond of union between 

 this bone and the tarsus is effected by a strong 

 iuterosseous ligament 

 that passes between 

 it and the internal 

 cuneiform. In Fig. 59 

 the knife is placed in 

 the position required 

 to divide that liga- 

 ment. 



In the subastra- 

 galoid amputa- 

 tions a disarticula- 

 tion is effected at the 

 astragalo-scaphoid and 

 astragalo - calcaneal 

 joints. The astragalus 

 is the only bone of the 

 foot left behind and 

 forms the summit of 

 the stump. 



Fig. 60 shows the 

 position of the more 

 important structures 

 that are divided in 

 amputation of the 

 great toe together with 

 its metatarsal bone. 



The iiervc sup- 

 ply of the lower limb. In Fig. 61 is shown the 

 cutaneous nerve-supply of the inferior extremities on 

 both the anterior and the posterior aspect. Paralyses 

 of the lower limbs are common, but are more often 

 due to some lesion in the inferior segment of the cord 

 than to damage received by any one individual nerve. 

 Cases, however, are recorded where a single trunk has 



Fig. 59. Lisfraiic's Operation (Agatz). 



o, *, c. Inner, middle, and outer cuneiform 

 bones ; d, cuboid : c./, the metntarsal bones ; 

 g, tibialis nnlicns; A, extensor proprlui 

 I ml lii-is ; i, extensor e.-nuuunis (hint or tun ; 

 j, extensor brevis difritnrtun ; fc, extensor 

 tendons ; /, dorsalig i>edig artery. 



