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- Use of this artwork requires proper credit to be given (Permission: Dr. Joe Muscolino. www.learnmuscles.com – art work Giovanni Rimasti)
The Depressor Labii Inferioris is a muscle of facial expression of the mouth. The muscles of facial expression of the mouth are:
- Levator Labii Superioris Alaeque Nasi (also a muscle of fascial expression of the nose)
- Levator Labii Superioris
- Zygomaticus Minor
- Zygomaticus Major
- Levator Anguli Oris
- Risorius
- Depressor Anguli Oris
- Depressor Labii Inferioris
- Mentalis
- Buccinator
- Orbicularis Oris
- Platysma
ATTACHMENTS:
- Mandible to the lower lip.
ACTIONS:
- Depresses the lower lip.
- Draws laterally the lower lip.
- Everts the lower lip.
NOTES:
- Contraction of the depressor labii inferioris can contribute to the facial expressions of sadness or uncertainty/doubt.
- Eversion of the lower lip is to protrude and curl the lower lip outward.
- Labii inferioris is Latin for lower lip.
