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Extensor Indicis
From WikiMSK
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| Extensor Indicis | |
|---|---|
| Muscle Type | |
| Origin | Dorsal surface of the shaft of the ulna below the origin of the extensor pollicis longus |
| Insertion | Second digit extensor hood via the tendon of the extensor digitorum |
| Action | MCP extension; extends PIP joint of the index finger, assists in adduction of the index finger and in extension of the wrist |
| Synergists | Extensor Digitorum |
| Antagonists | |
| Spinal innervation | C7, C8 |
| Peripheral Innervation | Posterior Interosseous Nerve (branch of Radial Nerve) |
| Vasculature | |
Palpation
Over the dorsal/ulnar aspect of the second metacarpal, close to the hand
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