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Abductor Pollicis Longus
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| Abductor Pollicis Longus | |
|---|---|
| Muscle Type | |
| Origin | Lateral aspect of the dorsal surface of the shaft of the ulna |
| Insertion | Base of the first metacarpal, radial aspec |
| Action | Thumb Abduction, also assists with wrist radial deviation. |
| Synergists | Abductor Pollicis Brevis, Palmaris Longus, Extensor Pollicis Brevis, Opponens Pollicis |
| Antagonists | |
| Spinal innervation | C7, C8, T1 |
| Peripheral Innervation | Posterior Interosseous Nerve (branch of Radial Nerve) |
| Vasculature | |
The most anterior of the 3 tendons at the base of the CMC joint; palpate immediately proximal to the CMC joint
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