Opponens pollicis muscle

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The opponens pollicis muscle is a muscle in the hand that flexes and medially rotates the thumb, bringing it in front of the palm.

Contents

Origin

The opponens pollicis muscle originates from the base of the hand below the thumb, at the flexor retinaculum and the tubercle of the trapezium bone.

Insertion

The opponens pollicis muscle inserts on the thumb at the first metacarpal bone.

Action

The opponens pollicis muscle flexes and medially rotates the thumb at the carpometacarpal and metacarpophalangeal joints.

Innervation

The opponens pollicis muscle is innervated by the recurrent branch of the median nerve (C8 and T1).

See also

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