Opponens digiti minimi muscle

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The opponens digiti minimi muscle is the deepest of the muscles within the hypothenar eminence, and is one of the intrinsic muscles of the hand.

Summary

  • origin: hook of hamate and flexor retinaculum
  • insertion: medial aspect of the 5 metacarpal
  • action: flexion and lateral rotation of the 5 metacarpal about the 5carpometacarpal joint
  • arterial supply: ulnar artery
  • innervation: deep branch of ulnar nerve