extensor pollicis brevis

extensor pollicis brevis definition - medical

extensor pol·li·cis brevis (pŏlˈə-sĭs, -kĭs)

noun
A muscle with origin from the trapezium and the flexor retinaculum, with insertion to the proximal phalanx of the thumb, with nerve supply from the median nerve, and whose action abducts the thumb.

The American Heritage® Medical Dictionary Copyright © 2009 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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