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Opponens Digiti Minimi
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| Opponens Digiti Minimi | |
|---|---|
| Muscle Type | |
| Origin | Hook of hamate bone and flexor retinaculum |
| Insertion | Entire length of MC5, ulnar side |
| Action | Opposes (flexion with slight rotation) the CMCJ of little finger, lifting ulnar border of hand into a position where the MCP flexors can oppose the little finger to the thumb. |
| Synergists | |
| Antagonists | |
| Spinal innervation | C7, C8, T1 |
| Peripheral Innervation | Ulnar Nerve |
| Vasculature | |
Manual Muscle Testing
Patient: Sitting or supine
Fixation: Hand stabilised by clinician or resting on table. MC1 is held firmly by clinician
Test: Opposition of MC5 towards MC1
Pressure: Against palmar surface along MC5, into the direction of flattening the palm of the hand. Usually with the thumb.
