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

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Muscles which Produce MCP Joint Adduction

Note: by convention, digital adduction is defined as movement toward the middle finger ray, not medially toward the trunk.

Digit radial deviation
Digit ulnar deviation

Thumb: Adductor Pollicis and Extensor Pollicis Longus

Index: First Palmar Interosseous

Ring: Second Palmar Interosseous

Small: Third Palmar Interosseous

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