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abductor pollicis longus |
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abductor pollicis longus,
a muscle that originates from the proximal posterior surfaces of the radius and ulna and from the related interosseous membrane and forms a tendon that passes into the thumb and inserts on the lateral side of the base of the first metacarpal. Its major function is to abduct the thumb at the joint between the first metacarpal and trapezium bones. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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