Opponens pollicis muscle

Muscles · Latin: Musculus opponens pollicis

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The opponens pollicis is a small, triangular muscle in the hand, which functions to oppose the thumb.

It is one of the three thenar muscles.

It lies deep to the abductor pollicis brevis and lateral to the flexor pollicis brevis.

Definition from Wikipedia, CC BY-SA 4.0.