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Sagittal depiction of the anatomy of the finger flexor pulley system. The flexor digitorum superficialis (blue) and flexor digitorum profundus (green) are displayed. Annular pulleys are represented using A1–A5 and cruciate pulleys using C1–C4. MCP, metacarpophalangeal joint; PP, proximal phalanx; MP, middle phalanx; DP, distal phalanx.
