Depressor labii inferioris muscle
Depressor Labii Inferioris Muscle
The Depressor Labii Inferioris Muscle (pronunciation: deh-PRESS-or LAH-bee-eye in-FEAR-ee-oris) is a facial muscle that helps in lowering the lower lip.
Etymology
The term "Depressor Labii Inferioris" is derived from Latin, where "Depressor" means 'lowering', "Labii" means 'lip', and "Inferioris" means 'lower'.
Function
The primary function of the Depressor Labii Inferioris Muscle is to pull down the lower lip, which aids in expressions of sadness or doubt. It also helps in opening the mouth wide.
Anatomy
The Depressor Labii Inferioris Muscle originates from the oblique line of the Mandible, and it inserts into the skin of the lower lip. It is innervated by the Facial Nerve (cranial nerve VII).
Related Terms
- Facial Muscles: The group of muscles in the front of the neck that control facial expressions.
- Mandible: The lower jawbone in mammals.
- Facial Nerve: The seventh cranial nerve that controls the muscles of facial expression.
See Also
- Orbicularis Oris Muscle: A complex of muscles in the lips that encircles the mouth.
- Mentalis Muscle: A pair of small, triangular muscles located at the tip of the chin.
External links
- Medical encyclopedia article on Depressor labii inferioris muscle
- Wikipedia's article - Depressor labii inferioris muscle
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