medial pterygoid muscle


n.

A muscle with origin from the pterygoid fossa of the sphenoid bone and the tuberosity of the maxilla, with insertion into the medial surface of the mandible, with nerve supply from the medial pterygoid branch of the mandibular division of the trigeminal nerve, and whose action raises the mandible and closes the jaw.

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