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Abductor pollicis longus

Origin

1- lateral dorsal ulna below the insertion of the Anconæus
2- the interosseous membrane
3- middle third dorsal surface of radius

Insertion

anterior aspect of the base of the first metacarpal

Action(s)

abducts and extends the thumb at CMC joint / wrist flexion / wrist abductor

Nerve Supply

PIN

Arterial Supply

Posterior Interosseous Artery

Physical Exam

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Clinical Importance

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Disease States

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Discussion

Discussion on muscle

Figures

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Credits:

From Wikipedia: Abductor pollicis longus

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