Second Palmar Metacarpal Artery, Anterior View

Description

Arising from the deep palmar arch, the second palmar metacarpal artery runs distally in the second intermetacarpal space, closely applied to the palmar surfaces of the second and third metacarpals and deep to the flexor tendons. From an anterior (palmar) perspective, the vessel sits centrally within the deep palm, with the metacarpal shafts superficial to the interosseous compartment and the digital rays fanning distally toward the proximal, middle, and distal phalanges. Blue superficial and deep veins accompany the arterial course and communicate across the palm, while the carpal bones form the proximal bony foundation at the wrist. Deep territory. Clinically, this artery matters because it contributes directly to the common palmar digital arteries and the perfusion of the index and middle finger rays, territories frequently assessed when evaluating traumatic lacerations in the palm or compromised flow after crush injuries. Hand surgeons also use the deep palmar arch and its palmar metacarpal branches as landmarks during deep space infection drainage and when working near the adductor pollicis and interossei, where a misdirected dissection can produce brisk bleeding that is hard to control in the confined palmar compartments. This anterior view also helps clarify why collateral flow from the superficial palmar arch may not fully protect the metacarpal spaces when the deep arch is injured or spastic. Designed for upper-limb anatomy teaching, the plate supports lectures and lab manuals on palmar vascularization, arterial anastomoses, and compartmental relationships of the hand, and it fits cleanly into surgical education materials discussing palmar incisions and hemostasis. Publishers will find it useful in chapters on hand trauma, microvascular repair planning, and comparative diagrams pairing skeletal landmarks with arterial pathways. Anatomical accuracy verified by SciePro's Medical Advisory Board.