Depressor anguli oris muscle

Changed by Daniel J Bell, 29 Dec 2019

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Depressor anguli oris muscle
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The depressor anguli oris muscle (triangularis)(also known as the triangularis muscle) is one of the muscles of facial expression.

Summary

  • origin: oblique line of the mandible
  • insertion: 
    • angle of the mouth
    • superficial fibres from both sides merge to form the transversus menti
  • innervation: facial nerve
  • action: 
    • depresses the angle of the mouth, e.g. frowning
  • -<p>The <strong>depressor anguli oris</strong> (triangularis) muscle is one of the <a title="Muscles of facial expression" href="/articles/facial-muscles">muscles of facial expression</a>.</p><h4>Summary</h4><ul>
  • +<p>The <strong>depressor anguli oris muscle</strong> (also known as the <strong>triangularis muscle</strong>) is one of the <a href="/articles/facial-muscles">muscles of facial expression</a>.</p><h4>Summary</h4><ul>
  • -<li>superficial fibres from both sides merge to form the <a title="transversus menti" href="/articles/transversus-menti">transversus menti</a>
  • +<li>superficial fibres from both sides merge to form the <a href="/articles/transversus-menti">transversus menti</a>
  • -<strong>innervation</strong>: <a title="Facial nerve" href="/articles/facial-nerve">facial nerve</a>
  • +<strong>innervation</strong>: <a href="/articles/facial-nerve">facial nerve</a>

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triangularisTriangularis muscle

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Depressor anguli oris muscle
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