Opponens Digiti Minimi

Joe Muscolino

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The opponens digiti minimi intrinsic muscle of the hand. The transverse carpal ligament (flexor retinaculum) has been drawn in.

The Opponens Digiti Minimi is a member of the Hypothenar Eminence Group of intrinsic muscles of the hand, composed of the:

 

ATTACHMENTS:

  • The opponens digiti minimi attaches from the transverse carpal ligament and the hamate to the metacarpal of the little finger.
    • The transverse carpal ligament is also known as the flexor retinaculum.

 

ACTIONS:

  • Opposes the little finger at the carpometacarpal joint.
  • Flexes the little finger at the carpometacarpal joint.
  • Laterally rotates the little finger at the carpometacarpal joint.
  • Adducts the little finger at the carpometacarpal joint.

 

NOTE: Opposition of the little finger is an oblique-plane motion pattern of the metacarpal of the little finger at the carpometacarpal joint that comprises the cardinal-plane joint actions of flexion, lateral rotation, and adduction of the metacarpal of the little finger.