The dorsal metacarpal arteries.
The radial and ulnar arteries, which are branches of the brachial artery, provide the blood supply to the hand. Supplemental arteries in the forearm include the anterior interosseous artery, the posterior interosseus artery, and (occasionally) the median artery, all of which are branches of the ulnar artery. In the distal third of the hand and webspaces, the dorsal metacarpal arteries supply two or three perforator branches, which travel between the tendons and tendon sheaths of the back of the hand to reach the skin, where they divide into two or more short branches (salmon, 1988). Proximal to the wrist, the palmar cutaneous branch provides sensation at the hypothenar eminence. The dorsal branch, which branches from the main trunk at the distal forearm, provides sensation to the ulnar portion of the dorsum of the hand and small finger, and part of the ring finger. An artery that supplies blood to the medial side of the cerebral hemisphere and the corpus callosum; it is part of the circle of Willis, and it branches from the internal carotid artery at the base of the brain. The arteries and veins. The ulnar and radial arteries carry blood down through the forearm into the wrist, where they anastomose (join together) to form arches. These arches, along with several branches, supply blood to the hand and digits. Here are the arteries that enter the wrist: Anterior interosseous artery: This artery runs from the ulnar artery anterior to the interosseous membrane. It pierces the membrane distally to join the dorsal carpal arch.
http://emedicine.medscape.com/article/1285060-overview http://www.annabakeraesthetics.com/pdf/hand-anatomy.pdf http://emedicine.medscape.com/article/1285060-overview http://medical-dictionary.thefreedictionary.com/digital+arteries+of+hand%2c+dorsal http://www.dummies.com/how-to/content/nerves-arteries-and-veins-of-the-wrist-and-hand.html
what artery supplies dorsal part of hand