Digital Arteries, Posterior View

Description

Dorsal (posterior) hand anatomy is rendered with the vascular network overlaid on the skeletal framework, tracing the radial artery laterally toward the anatomical snuffbox and the ulnar artery medially as they contribute to the dorsal carpal arch. From this arch, dorsal metacarpal arteries course distally in the intermetacarpal spaces, then divide into dorsal digital arteries that run along the dorsolateral margins of each finger. Terminal branches arborize over the dorsal aspects of the proximal, middle, and distal phalanges, with paired dorsal digital veins accompanying them more superficially and forming a denser, interconnected blue network. Orientation is clear. Proximal vessels lie over the carpal and metacarpal region, while the finest arterioles and venules concentrate distally near the nail bed and distal interphalangeal level. Posterior vascular mapping of the digits matters when you need to predict perfusion to dorsal skin and nail unit, where anastomoses between palmar proper digital arteries and dorsal branches can determine tissue survival after injury. This view aligns with common incision planning for dorsal approaches to the proximal interphalangeal and distal interphalangeal joints and for extensor tendon procedures, where dorsal veins are prone to troublesome bleeding and the dorsal digital arteries can be compromised by lacerations along the finger margins. It also supports teaching the clinical pattern of Raynaud phenomenon and digital ischemia, which often presents in the distal phalanges even when proximal pulses remain palpable. Hand surgeons, emergency clinicians, and anatomy faculty can use this plate to explain dorsal hand laceration risk, flap design on the dorsum of the finger, and the distal distribution of arterial supply in relation to phalangeal landmarks in gross anatomy, orthopedics, and plastic surgery texts. It also fits well in vascular access and microvascular training materials where dorsal veins are selected for cannulation and dorsal arterial branches must be respected. Anatomical accuracy verified by SciePro's Medical Advisory Board.