Opponens digiti minimi muscle

From Wikipedia, the free encyclopedia
  (Redirected from Opponens digiti minimi)
Jump to: navigation, search
Opponens digiti minimi muscle
Gray426.png
The muscles of the thumb. (Opponens quinti digiti visible at center right.)
Musculusopponensdigitiminimi.png
Front of the left forearm. Deep muscles. (Opponens digiti quinti visible at bottom left.)
Latin musculus opponens digiti minimi
Gray's p.464
Origin Hook of hamate and flexor retinaculum
Insertion Medial border of 5th metacarpal
Artery ulnar artery
Nerve deep branch of ulnar nerve (C8 and T1)
Actions Draws 5th metacarpal anteriorly and rotates it, bringing little finger (5th digit) into opposition with thumb
Anatomical terms of muscle

The opponens digiti minimi (opponens digiti quinti in older texts) is a muscle in the hand. It is of a triangular form, and placed immediately beneath the palmaris brevis, abductor minimi digiti, and flexor brevis minimi digiti. It is one of the three hypothenar muscles that controls the little finger.

It arises from the convexity of the hamulus of the hamate bone, and contiguous portion of the transverse carpal ligament; it is inserted into the whole length of the metacarpal bone of the little finger, along its ulnar margin.

Opponens minimi digiti serves to flex and laterally rotate the 5th metacarpal about the 5th carpometacarpal joint, as when bringing little finger and thumb into opposition. It is innervated by the deep branch of the ulnar nerve.

See also[edit]

Additional images[edit]

External links[edit]

This article incorporates text from a public domain edition of Gray's Anatomy.