Depressor labii inferioris muscle
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188222213
2008-01-31T20:26:18Z
Banano03
5980645
{{Muscle infobox |
Name = Depressor labii |
Latin = musculus depressor labii inferioris |
GraySubject = 108 |
GrayPage = 383 |
Image = Depressor labii inferioris.png |
Caption = Muscles of the head, face, and neck. |
Origin = oblique line of the [[mandible]], between the [[symphysis]] and the [[mental foramen]] |
Insertion = integument of the [[lower lip]], [[Orbicularis oris muscle|Orbicularis oris]] fibers, its fellow of the opposite side |
Blood = |
Nerve = [[facial nerve]] |
Action = [[Depression (kinesiology)|depress]] the [[lower lip]] |
DorlandsPre = m_22 |
DorlandsSuf = 12548762 |
}}
The '''depressor labii inferioris''' (or '''quadratus labii inferioris''') is a [[facial muscle]] that helps lower the [[bottom lip]].
==Structure==
This muscle arises from the oblique line of the mandible, and inserts on the skin of the lower lip, blending in with the [[orbicularis oris]] muscle.
At its origin, depressor labii is continuous with the fibers of the [[platysma muscle]]. Much yellow fat is intermingled with the fibers of this muscle.
==Innervation==
The depressor labii inferioris is innervated by the [[facial nerve]].
==Actions==
This muscle helps to depress the lower lip.
==See also==
* [[Facial muscles]]
* [[Depressor anguli oris]]
==Additional images==
<gallery>
Image:Gray176.png|Mandible. Outer surface. Side view.
</gallery>
==External links==
* {{MuscleLoyola|dli}}
* {{GPnotebook|-677773235}}
* {{eMedicineDictionary|Depressor+labii+inferioris+muscle}}
{{Gray's}}
{{muscle-stub}}
{{Muscles_of_head}}
[[Category:Muscles of the head and neck]]
[[ar:عضلة خافضة للشفة السفلية]]
[[de:Musculus depressor labii inferioris]]
[[hu:Alsó ajkat lefelé húzó izom]]
[[ja:下唇下制筋]]
[[sr:Мишић обарач доње усне]]
[[sh:Mišić obarač donje usne]]
[[fi:Alahuulen alasvetäjälihas]]