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abductor pollicis longus |
Also found in: Acronyms, Wikipedia | 0.04 sec. |
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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. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| ? Mentioned in | ? References in periodicals archive | |
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(12,14) The PIN divides into
terminal branches that innervate the extensor digitorum, extensor digiti
minimi, extensor carpi ulnaris, extensor pollicis longus and brevis,
extensor indicis, and the abductor pollicis longus muscles. The abductor pollicis longus and extensor pollicis brevis tendons
pass through the first dorsal compartment of the wrist beneath the
extensor retinaculum and can angle sharply when the wrist is deviated
radially. |
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