1430 



CLINICAL AND' TOPOGRAPHICAL ANATOMY 



radius and ulna, the extensor digiti quinti; and the sixth, lying just lateral to the styloid process 

 of the ulna, the extensor carpi ulnaris. The sheaths for the last two extensors are the only ones 

 which follow the tendons of their insertion, the others ending at a varying distance below the 

 carpal hgament. The lower border of the dorsal carpal corresponds to the upper margin of the 

 transverse carpal ligament. 



Fig. 1148. — Transverse Section of the Wrist through the Middle of the Pisiform Bone. 



Sheath of flexores sublimis and profundus digitorum and flexor poilicis longus 

 enclosed by the transverse carpal ligament 

 Cut tendon of palmaris longus I Ulnar nerve 



Lunate bone I l Ulnar vessels 



Sheath for flexor carpi radialis 

 Radial origin of transverse 

 carpal ligament 

 Sheath for abductor longus and 

 extensor brevis poilicis 



Radial vessels 

 Sheath for abductor longus and 

 extensor brevis poilicis 



Capitatum 



Sheath of extensor poilicis longus' 



navicular' 



Sheath of extensor carpi ulnaris 



Sheath of extensores carpi radialis, longus and brevis ■ I Sheath of extensor digiti quinti 



Triquetrum 

 Sheath of extensor communis and indicis j Hamatum 



Lunatum 



Fig. 1149. — Diagram of the Great Palmar Bursa. 



Ulnar portion of palmar bursa 

 Radial portion of palmar bursa 



Transverse carpal ligament 



Lumbricalis 



Deep transverse 

 ligament 



-Superficial transverse ligament 



Tho palmar aponeurosis, by its strength, toughness, numerous attachments, 

 and intimate connection with the superficial fascia and skin is well adapted to pro- 

 tect the parts beneath from pressure. 



The thenar and hypothonar muscloa am onclosod in two processes, which arc thinner so as 

 not to interfere with tiio contraction of the .subjacent muscles. The central part, pointed above 



