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Anatomy & Histology · single question

Which muscle's posterior fibers are responsible for retruding (retracting) the mandible?

  1. The posterior fibers of the temporalis muscle
  2. The masseter
  3. The medial pterygoid
  4. The lateral pterygoid
Show answer and explanation

Correct answer: A. The posterior fibers of the temporalis muscle

The posterior, more horizontally oriented fibers of the temporalis muscle pull the mandible backward, retruding it — while its more vertically oriented anterior fibers primarily contribute to elevation (closing).

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