350 



DR. 0. F. SONNTAG ON THE ANATOMY, 



proximal inch, and from the interosseous membrane. Some 

 fibres fuse with the flexor sublimis. It has a strong tendon to 

 the palmar aspect of the terminal phalanx of the index, and a 

 very fine tendon to the corresponding part of the pollex. This 

 agrees with the descriptions of Ohampneys (11), Hepburn (24), 

 and others. 



The flexor profundus digitorum arises from the inner side of 

 the olecranon, the inner surface of the iipper two-thirds of the 

 shaft of the ulna and the interosseous membrane ; and some of 

 the fibres fuse with the flexor sublimis and flexor carpi ulnaris. 

 The strong tendon divides into three tendons running to the 

 palmar aspects of the terminal phalanges of the third, fourth, 



Text-figure 35. 



APB\ 

 A. ■"^^ OP. UFCR FgMD- 



The muscles and joints of the hand. F.B.P.D : deep part of the flexor hrevis 

 pollicis; F.C.R: flexor carpi radialis ; F.C.U: flexor carpi uhiaris; F.D.I : 

 first dorsal interosseous muscle ; F.P.D : flexor profundus digitorum ; F.S.D : 

 flexor sublimis digitorum. Other letters in text. 



and fifth digits. There is no continuity with the flexor longus 

 pollicis. Several authors have described similar conditions. 



The pronator quadratics runs downwards and outwards from 

 the lower inch and a half of the front of the shaft of the ulna 

 to the lower inch of the front of the shaft of the radius. Fibres 

 wrap round both bones and extend down to the interosseous 

 membrane. 



Lumhricales : — 'These arise as in Man, and the general dis- 

 position is similar, but a well-marked muscular slip connects the 

 first and second. The first and second muscles have long origins 

 from the flexor tendons, but the second and third muscles quickly 



