medial rectus muscle


n.

A muscle with origin from the fibrous ring surrounding the optic canal, with insertion into the medial part of the sclera of the eye, with nerve supply from the oculomotor nerve, and whose action directs the pupil medialward.

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