Extensor Pollicis Longus

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Extensor Pollicis Longus insertion

dorsal surface of base of distal phalanx of 1st digit

Extensor Pollicis Longus actions

extension of IP joint of 1st digit, extension of CM, MP joints with continued action, lateral rotation and adduction of CM, MP joints

Extensor Pollicis Longus origin

lateral aspect of middle 1/3 of dorsal surface of ulna, interosseous membrane

Extensor Pollicis Longus innervation

radial nerve (C7-C8)


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