Levator labii superioris 2561851 185003901 2008-01-17T16:45:04Z ELLusKa 86 2920235 iw {{Infobox Muscle | Name = {{PAGENAME}} | Latin = musculus levator labii superioris | GraySubject = 108 | GrayPage = 383 | Image = Levator labii superioris.png | Caption = Muscles of the head, face, and neck. | Image2 = | Caption2 = | Origin = [[Medial infra-orbital margin]] | Insertion = Skin and muscle of the [[upper lip]] ([[labii superioris]]) | Action = [[Elevation (kinesiology)|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 (anatomy)|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. ==See also== * [[facial expression]] * [[levator labii superioris alaeque nasi]] ==Additional images== <gallery> Image:Gray157.png|Left maxilla. Outer surface. Image:Gray165.png|Left zygomatic bone. Malar surface. Image:Gray508.png|The arteries of the face and scalp. </gallery> ==External links== * {{MuscleLoyola|lls}} * {{GPnotebook|-1993015216}} * {{eMedicineDictionary|levator+labii+superioris+muscle}} * [http://www.ptcentral.com/muscles/musclehead.html#levator%20labii%20superioris%20alaeque%20nasi PTCentral] {{Gray's}} {{Muscles of head}} {{muscle-stub}} [[Category:Muscles of the head and neck]] [[de:Musculus levator labii superioris]] [[es:Elevador propio del labio superior]] [[hu:Felsőajak-emelő izom]] [[ja:上唇挙筋]] [[sr:Мишић подизач горње усне]] [[sh:Mišić podizač gornje usne]] [[fi:Ylähuulen kohottajalihas]]