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Extensor Pollicis Brevis
From WikiMSK
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| Extensor Pollicis Brevis | |
|---|---|
| Muscle Type | |
| Origin | Dorsal surface of the distal radius |
| Insertion | Base of the first proximal phalanx of the thumb |
| Action | MCP Extension |
| Synergists | |
| Antagonists | |
| Spinal innervation | C7, C8, T1 |
| Peripheral Innervation | Posterior Interosseous Nerve (branch of Radial Nerve) |
| Vasculature | |
Palpation
Palpate the tendon of the extensor pollicis brevis as it crosses the lateral aspect of the base of the first MCP
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