Depressor Labii Inferioris

Joe Muscolino

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The depressor labii inferioris. The orbicularis oris has been ghosted in.

The Depressor Labii Inferioris is a muscle of facial expression of the mouth. The muscles of facial expression of the mouth are:





  • Depresses the lower lip.
  • Draws laterally the lower lip.
  • Everts the lower lip.



  1. Contraction of the depressor labii inferioris can contribute to the facial expressions of sadness or uncertainty/doubt.
  2. Eversion of the lower lip is to protrude and curl the lower lip outward.
  3. Labii inferioris is Latin for lower lip.