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ASSH > Information for Public & Patients > Hand Anatomy > Muscles > Muscles which Produce MCP Joint Flexion

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Muscles which Produce MCP Joint Flexion

Thumb: the Abductor Pollicis Brevis, the Adductor Pollicis and the Flexor Pollicis Brevis

Index: the First Dorsal Interosseous, the First Palmar Interosseous, and the Index Lumbrical

Middle: the Second Dorsal Interosseous, the Third Dorsal Interosseous and the Middle Lumbrical

Ring: the Second Palmar Interosseous, the Fourth Dorsal Interosseous and the Ring Lumbrical

Small: the Third Palmar Interosseous, the Abductor Digiti Minimi, the Flexor Digiti Minimi and the Small Lumbrical

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