smaller posterior rectus muscle of head


A muscle with origin from the posterior tubercle of the atlas, with insertion into the medial third of the occipital bone, with nerve supply from the first cervical nerve, and whose action rotates the head and draws it backward.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.