What is the action of the medial temporalis?

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Prepare for the Medbridge Orthopedic Clinical Specialist Test. Test your knowledge with multiple choice questions, each featuring hints and explanations. Ace your exam with ease!

Multiple Choice

What is the action of the medial temporalis?

Explanation:
The medial temporalis is a jaw closing muscle that helps elevate the mandible. In addition to lifting the jaw, its posterior fibers pull the mandible back (retrude). When one side contracts alone, it can contribute to a slight side-to-side (grinding) movement as the mandible is guided toward the opposite side. This combination of elevating, retruding, and aiding lateral movement fits the described action. Depression of the mandible is carried out by other muscles, not the temporalis, and protrusion is mainly achieved by other muscles working with the anterior temporalis and medial pterygoid.

The medial temporalis is a jaw closing muscle that helps elevate the mandible. In addition to lifting the jaw, its posterior fibers pull the mandible back (retrude). When one side contracts alone, it can contribute to a slight side-to-side (grinding) movement as the mandible is guided toward the opposite side. This combination of elevating, retruding, and aiding lateral movement fits the described action. Depression of the mandible is carried out by other muscles, not the temporalis, and protrusion is mainly achieved by other muscles working with the anterior temporalis and medial pterygoid.

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