Third Dorsal Metacarpal Artery, Posterior View

Description

Running along the dorsum of the hand, the third dorsal metacarpal artery is traced in relation to the third metacarpal and the adjacent intermetacarpal space, with its course oriented distally toward the web space between the middle and ring fingers. Extensor tendons to the digits lie superficially, fanning distally over the metacarpals toward the proximal phalanges, while the dorsal interossei occupy the deeper intervals between metacarpal shafts. Blue superficial dorsal veins cross obliquely and communicate proximally with the dorsal venous network over the wrist, framing the arterial channel in the subcutaneous plane. Posterior perspective. Clear landmarks. Understanding the third dorsal metacarpal artery matters when planning dorsal approaches to the third and fourth metacarpals, where surgical exposure and retraction can jeopardize small-caliber vessels and their cutaneous branches. This pathway also anchors teaching of the dorsal carpal arch and its dorsal metacarpal branches, a pattern that explains why dorsal hand lacerations can bleed briskly and why flap design for dorsal hand coverage often respects the intermetacarpal vascular axis. The relationship to extensor tendons helps learners anticipate where tendon repair, ganglion excision, or fracture fixation may intersect vascular territory. Hand anatomy courses, operative atlases for metacarpal fracture management, and lecture slides on the dorsal carpal arterial network will benefit from this focused posterior view that keeps tendons, veins, and vessel trajectory in the same frame. It also fits clinical patient-education materials for dorsal hand injuries where explaining bleeding sources and safe incision corridors improves consent discussions. Anatomical accuracy verified by SciePro's Medical Advisory Board.