Levator labii superioris

Infobox Muscle
Name = PAGENAME
Latin = musculus levator labii superioris
GraySubject = 108
GrayPage = 383


Caption = Muscles of the head, face, and neck.


Caption2 =
Origin = Medial infra-orbital margin
Insertion = Skin and muscle of the upper lip (labii superioris)
Action = Elevates the upper lip
Blood = facial artery
Nerve = buccal branch of the facial nerve (C.N. VII)
Antagonist =
DorlandsPre = m_22
DorlandsSuf = 12549597
The levator labii superioris (or quadratus labii superioris) is a broad sheet, the origin of which extends from the side of the nose to the zygomatic bone.

Its medial fibers form the "angular head", which arises by a pointed extremity from the upper part of the frontal process of the maxilla and passing obliquely downward and lateralward divides into two slips.

One of these is inserted into the greater alar cartilage and skin of the nose; the other is prolonged into the lateral part of the upper lip, blending with the infraorbital head and with the Orbicularis oris.

The intermediate portion or "infraorbital head" arises from the lower margin of the orbit immediately above the infraorbital foramen, some of its fibers being attached to the maxilla, others to the zygomatic bone.

Its fibers converge, to be inserted into the muscular substance of the upper lip between the angular head and the Caninus.

The lateral fibers, forming the "zygomatic head", arise from the malar surface of the zygomatic bone immediately behind the zygomaticomaxillary suture and pass downward and medialward to the upper lip.

ee also

* facial expression
* levator labii superioris alaeque nasi


=Additional

External links

*
*
*
* [http://www.ptcentral.com/muscles/musclehead.html#levator%20labii%20superioris%20alaeque%20nasi PTCentral]


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Look at other dictionaries:

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  • levator labii superioris — levator la·bii su·pe·ri·or·is lā bē .ī su̇ .pir ē ȯr əs n a facial muscle arising from the lower margin of the orbit and inserting into the muscular substance of the upper lip which it elevates called also quadratus labii superioris …   Medical dictionary

  • levator labii superioris alaeque nasi — levator labii superioris alae·que na·si ā lē kwē nā .zī n a muscle that arises from the nasal process of the maxilla, that passes downward and laterally, that divides into a part inserting into the alar cartilage and one inserting into the upper… …   Medical dictionary

  • Levator labii superioris alaeque nasi muscle — Muscle infobox Name = Levator labii superioris alaeque nasi muscle Latin = musculus levator labii superioris alaeque nasi GraySubject = GrayPage = Caption = Muscles of the head, face, and neck. (Levator labii superioris alaeque nasi not labeled,… …   Wikipedia

  • levator labii superioris alaeque nasi — noun A muscle of the face, dilating the nostril and elevating the upper lip. Syn: levator labii superioris alaeque nasi muscle …   Wiktionary

  • levator labii superioris muscle — musculus levator labii superioris …   Medical dictionary

  • levator labii superioris alaeque nasi muscle — musculus levator labii superioris alaeque nasi …   Medical dictionary

  • Musculus levator labii superioris — Ursprung Maxilla, Os zygomaticum Ansatz Oberlippe Fun …   Deutsch Wikipedia

  • Musculus levator labii superioris alaeque nasi — Ursprung Oberkiefer (Processus frontalis) Ansatz Nasenflügel, Obe …   Deutsch Wikipedia

  • Musculus levator labii superioris — Muscle releveur de la lèvre supérieure Muscle élévateur de la lèvre supérieure (en rouge) Le muscle releveur de la lèvre supérieure (musculus levator labii superioris) ou muscle élévateur de la lèvre supérieure est un muscle pair, quadrilatère,… …   Wikipédia en Français

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