Chapter 4 Hand and Wrist 103
Figurę 4-2. A, C, and D, Dorsal aspect of the hand. A, fingernail; B, cuticle; C distal interphalangeal joint; D, proximal interphalangeal joint; £, metacarpophalangeal joint; Z7, web space; G, distal phalanx; H, middle phalanx; /, proximal phalanx; J, metacarpal; K, first dorsal interosseous; L, extensor tendon (index finger). B, closc up of thumb.