A, Arterial supply of dorsum of wrist. 1, Dorsal branch of anterior interosseous artery; 2, dorsal radiocarpal arch; 3, branch to dorsal ridge of scaphoid; 4, dorsal intercarpal arch; 5, basal metacarpal arch; 6, medial branch of ulnar artery; R, radial artery; U, ulnar artery. B, Arterial supply of palmar aspect of wrist. 1, Palmar branch of anterior interosseous artery; 2, palmar radiocarpal arch; 3, palmar intercarpal arch; 4, deep palmar arch; 5, superficial palmar arch; 6, radial recurrent artery; 7, ulnar recurrent artery; 8, medial branch, ulnar artery; 9, branch off ulnar artery contributing to dorsal intercarpal arch; R, radial artery; U, ulnar artery. C, Arterial supply of lateral aspect of wrist. 1, Superficial palmar artery; 2, palmar radiocarpal arch; 3, dorsal radiocarpal arch; 4, branch to scaphoid tubercle and trapezium; 5, artery to dorsal ridge of scaphoid; 6, dorsal intercarpal arch; 7, branch to lateral trapezium and thumb metacarpal; R, radial artery.