| Opponens digiti minimi muscle | |
|---|---|
 Deep muscles of the right hand, palmar view. | |
| Details | |
| Origin | Hook ofhamate andflexor retinaculum |
| Insertion | Medial border of 5thmetacarpal (in hand, 3rd digit is orientation of mid-line) |
| Artery | Ulnar artery |
| Nerve | Deep branch of ulnar nerve (C8 and T1) |
| Actions | Draws5th metacarpal anteriorly and rotates it, bringing little finger (5th digit) into opposition with thumb |
| Identifiers | |
| Latin | musculus opponens digiti minimi (Old: opponens quinti digiti) |
| TA98 | A04.6.02.064 |
| TA2 | 2531 |
| FMA | 37384 |
| Anatomical terms of muscle | |
Theopponens digiti minimi (opponens digiti quinti in older texts) is amuscle in thehand. It is of a triangular form, and placed immediately beneath thepalmaris brevis,abductor digiti minimi andflexor digiti minimi brevis. It is one of the threehypothenar muscles that control thelittle finger.[1]
It arises from the convexity of thehamulus of thehamate bone and the contiguous portion of thetransverse carpal ligament; it is inserted into the whole length of themetacarpal bone of the little finger, along its ulnar margin.
The opponens digiti minimi muscle serves to flex and laterally rotate the 5thmetacarpal about the 5thcarpometacarpal joint, as when bringing the little finger and thumb into opposition. It is innervated by thedeep branch of the ulnar nerve.
This article incorporates text in thepublic domain frompage 464 of the 20th edition ofGray's Anatomy(1918)
