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Extensor pollicis longus at rest
Extensor pollicis longus in thumb IP extension
Extensor pollicis longus
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Related Anatomy
Nerve
Radial nerve
Posterior interosseous nerve
Plexus
Brachial plexus
Muscle Group
Radial nerve - Finger & thumb extensors
Muscle Action
Thumb interphalangeal joint extension
Nerve Root
C7
C8
Brachial Plexus Trunk
Middle trunk
Lower trunk
Brachial Plexus Cord
Posterior cord
Brachial Plexus Division
Posterior division
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Superficial Layer of Posterior Forearm - Details
Upper Extremity - Nerve Innervation