Depressor labii inferioris muscle

Last revised by Daniel J Bell on 17 Apr 2022

Citation, DOI, disclosures and article data

Citation:

Bell D, Depressor labii inferioris muscle. Reference article, Radiopaedia.org (Accessed on 19 Apr 2024) https://doi.org/10.53347/rID-98968

DOI:

https://doi.org/10.53347/rID-98968

Permalink:

https://radiopaedia.org/articles/98968

rID:

98968

Article created:

16 Apr 2022, Daniel J Bell ◉

Disclosures:

At the time the article was created Daniel J Bell had no recorded disclosures.

Last revised:

17 Apr 2022, Daniel J Bell ◉

Disclosures:

At the time the article was last revised Daniel J Bell had no recorded disclosures.

Revisions:

2 times, by 1 contributor - see full revision history and disclosures

Systems:

Head & Neck

Sections:

Anatomy

Synonyms:

The depressor labii inferioris muscle, also known as quadratus labii inferioris muscle, is one of the facial muscles.

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