THE WRIST AND HAND 



1167 



fingers, corresponding to the metacarpo-phalangeal and intcrphalangeal joints, the 

 highest is placed nearly thnie-ciuarters of an inch (18 mm.) below its correspond- 

 ing joint. The middle folds are multiple for all the fingers, and are exactly 

 opposite to the first intcrphalangeal joints. The lowest creases are single, and are 



Fio. 731.— Section through region of Wrist, a little above the Joint. Kight 

 SIDE, Ui'i'EK Half of the Section. (Tillaux.) 



Flexor carpi radialis 



Radidl (irlertj 



Brachio-radialis 



Flexor longus pollicia 

 Flexor sublimiB 



Flexor profundus 



Pronator quadratus 



RADIAL NERVE 



Extensor ossis meta 



carpi polliciB ^-^ 



Extensor primi __\\\\ 

 iuternodii pollicis 



Extensor carpi radialis 



longior 

 Extensor carpi radialis 



brevior 



Extensor secundi internodii 

 pollicis 



Ulnar artery, wore 

 inlervally the SERVE 



interior internxseous 

 artery 



Flexor carpi ulnaris 



Extensors com- 

 I munis and indicis 



Extensor carpi ulnaris 

 Extensor minimi digiti 



placed a little above the corresponding joints. There are two single creases on the 

 thumb corresponding to the two joints, the higher crossing the metacarpo-phalan- 

 geal joint ol)liquely. The free edge of the web of the fingers, as measured from 

 the i)almar surface, is about three-quarters of an inch (18 mm.) from the meta- 

 carpo-phalangeal joints (Treves). 



Fig. 732. — Transverse Section of the Wrist, through the Middle or the 



PisiFOEM Bone. 



Sheath of flexores sublimis and profundus digitorum and flexor longus pollicis, 

 enclosed by the annular ligament 



Cut tendon of palmaris longus 



SEMILUNAR BONF 



Ur.X.il! SERVE 

 Ulnar vessels 



Sheath for flexor carpi radialis -77 



Radial origin of annular ligament - yir ^ilW 



Sheath for extensor ossis metaearpi A -zn^l^ 



and prim 



xiensor OSSIS meiaearpi ^- r^ulLL. 



i internodii pollicis ■'^fsffi^Tv^ 



RmVial n-ssr/s ■'' \mff,','i'^f^, 



xtensor ossis metaearpi V J f-'Ai- 



Sheath for extensor ossis metaearpi 

 and primi internodii pollicis 



OS MAGNUM 

 Sheath of extensor secundi 

 internodii pollicis 



Sheath of extensor carpi 

 ulnaris 



Sheath of extensores carpi radialis, longior and brevior 1 I | Sheith of extensor m;nimi digiti 



CUNEIFORM 

 Sheath of extensor communis and indicator UNCIFORM 



SEMILUNAR 



The superficial palmar arch, formed by the ulnar anastomosing with the 

 superficialis vohv, or radialis indicis, will be shown l)y a line descending to the 

 radial side of the pisiform l)one, and then, a little lower, coming across the ])alm 

 on a line with the thuml) when outstretched at right angles witii the index finger. 

 The digital arteries, the main branches of the superficial arch, run downwards 



