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Dorsal to MCP joint of thumb

Elevate the skin and fine subcutaneous tissue as a single layer, by blunt dissection, and expose the tendons of extensor ...

Exposure of the extensors

Elevate the skin and fine subcutaneous tissue as a single layer, by blunt dissection, and expose the tendons of extensor pollicis longus (EPL) and extensor pollicis brevis (EPB).