Origins and Insertions (Extensor Pollicis Longus)

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1. Extends distal phalanx of thumb 2. Extends proximal phalanx of thumb 3. Assists to extend the wrist (if fingers are flexed)

Action

Distal Phalanx of Thumb

Insertion

Radial (C6,7,8)

Nerve

1. Posterior surface of ulna 2. Interosseous Membrane

Origin


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