Depressor labii inferioris muscle
Citation, DOI, disclosures and article data
Citation:
Bell D, Depressor labii inferioris muscle. Reference article, Radiopaedia.org (Accessed on 21 Mar 2025) https://doi.org/10.53347/rID-98968
rID:
98968
Article created:
Disclosures:
At the time the article was created Daniel J Bell had no recorded disclosures.
View Daniel J Bell's current disclosures
Last revised:
Disclosures:
At the time the article was last revised Daniel J Bell had no recorded disclosures.
View Daniel J Bell's current disclosures
Revisions:
2 times, by
1 contributor -
see full revision history and disclosures
Systems:
Sections:
Synonyms:
- Depressor labii inferioris muscles
- Quadratus labii inferioris muscle
- Quadratus labii inferioris muscles
- Quadratus menti muscles
- Quadratus menti muscle
- Depressor labii inferioris (muscle)
The depressor labii inferioris muscle, also known as quadratus labii inferioris muscle, is one of the facial muscles.
Summary
- origin: oblique line of the mandible, medial to the mental foramen
-
insertion:
- modiolus at the angle of the mouth
- ascends to medially insert into lower lip
- innervation: facial nerve
- action: depresses the lower lip in a mild lateral direction
References
- 1. Chummy S. Sinnatamby. Last's Anatomy. (2011) ISBN: 9780702033940 - Google Books
- 2. FIPAT. Terminologia Anatomica. 2nd Ed. FIPAT.library.dal.ca. Federative International Programme for Anatomical Terminology, 2019. https://fipat.library.dal.ca/TA2/
- 3. Gray, H. Anatomy of the Human Body. Philadelphia: Lea & Febiger, 1918; Bartleby.com, 2000. www.bartleby.com/107/
- 4. Choi Y, We Y, Lee H et al. Three-Dimensional Evaluation of the Depressor Anguli Oris and Depressor Labii Inferioris for Botulinum Toxin Injections. Aesthet Surg J. 2021;41(6):NP456-61. doi:10.1093/asj/sjaa083 - Pubmed
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