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long muscle of head

n.
  1. A muscle with origin from the third to sixth cervical vertebrae, with insertion into the basilar process of the occipital bone, with nerve supply from the cervical plexus, and whose action twists or bends the neck forward.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.