CHAPTER VIII. 



WRIST AND HAND. 

 Anatomy of the Palm, Dorsum and Fingers. 



LANDMARKS. TUBERCULOSIS OF 



FUNCTIONS OF THE THE WRIST JOINT. 



PALMAR MUSCLES. OPERATIVE WORK. 

 MOVEMENTS OF WRIST 



AND CARPAL JOINTS. DI^CATI OF 



DISEASES. 



The structures on the front of the wrist and palm are, 

 (1) The integument; (2) The superficial fascia with 

 the ulnar and median cutaneous nerves; (3) The anterior 

 annular ligament, and (4) The palmar fascia; (5) The 

 muscles of the thumb and little finger; (6) The tendons 

 of the flexor muscles of the thumb and fingers with (7) 

 the superficial palmar arch and the median nerve lying up- 

 on them; beneath these tendons is (8) the deep palmar 

 arch, a deep layer of fascia intervening between it and 

 (9) the palmar interossei muscles and the metacarpal 

 bones. On the dorsum are (1) skin; (2) superficial fascia 

 supplied by the radial and ulnar nerves; (3) deep fascia 

 a portion of the latter constituting the posterior annular 

 ligament; (4) extensor tendons, each having a sheath of 

 synovial membrane around it, and each bound down by the 

 ligament, to the back of the lower end of the radius ; (5) 

 the radial trunk and the branches of the radial and ulnar 

 arteries; (6) the dorsal interossei muscles and the meta- 

 carpal bones. On the front of the fingers the structures 

 are: (1) integument; (2) superficial fascia, in which are 

 the collateral digital arteries, (branches of the superficial 

 palmar arch), lying beneath the digital branches of the 



