Abstract
This article describes the anatomy and clinical application of the lumbrical muscle flap. Anatomic and radiologic studies were performed in 20 fresh human cadaver hands injected with latex-lead-oxide solution. Only the 2 radial lumbrical muscles were found suitable for flap transposition. The vascular supply of the first and second lumbrical muscles is from branches originating in the superficial palmar arch and from the common palmar digital artery, respectively. The dominant branches invariably enter the muscle bellies at the junction of their proximal and middle thirds. Pedicled on these vessels, the lumbrical muscles can be transposed to reach the entire palm, up to the wrist flexion crease. The clinical use of the first and second lumbrical muscle flaps in 2 patients demonstrated the value of these flaps for coverage of the median nerve and its palmar branches.
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