lesser zygomatic muscle
A muscle with origin from the zygomatic bone, with insertion into the orbicular muscle of the mouth, with nerve supply from the facial nerve, and whose action draws the upper lip upward and outward.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.