Opponens digiti minimi muscle
|Opponens digiti minimi muscle|
|The muscles of the thumb. (Opponens quinti digiti visible at center right.)|
|Front of the left forearm. Deep muscles. (Opponens digiti quinti visible at bottom left.)|
|Latin||musculus opponens digiti minimi|
|Gray's||subject #126 464|
|Origin:||Hook of hamate and flexor retinaculum|
|Insertion:||Medial border of 5th metacarpal|
|Nerve:||deep branch of ulnar nerve (C8 and T1)|
|Action:||Draws 5th metacarpal anteriorly and rotates it, bringing little finger (5th digit) into opposition with thumb|
The opponens minimi digiti (opponens digiti quinti in older texts) is of a triangular form, and placed immediately beneath the palmaris brevis, abductor minimi digiti, and flexor brevis minimi digiti.
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.
This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.