Opponens digiti minimi muscle of hand

Opponens digiti minimi muscle

Deep muscles of the right hand, palmar view.
Origin Hook of hamate and flexor retinaculum
Insertion Medial border of 5th metacarpal (in hand, 3rd digit is orientation of mid-line)
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
Latin musculus opponens digiti minimi
(Old: Opponens quinti digiti)
TA A04.6.02.064
FMA 37384

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

Additional images


This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)

This article is issued from Wikipedia - version of the 11/17/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.