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the median line. In addition to these, fibers from the quadratus labii superioris, the zygomaticus, and the quadratus labii inferioris intermingle with the transverse fibers above described, and have principally an oblique direction. The proper fibers of the lips are oblique, and pass from the under surface of the skin to the mucous membrane, through the thickness of the lip.
234:; it consists of numerous strata of muscular fibers surrounding the orifice of the mouth, but having different direction. It consists partly of fibers derived from the other facial muscles which are inserted into the lips, and partly of fibers proper to the lips. Of the former, a considerable number are derived from the
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Superficial to this stratum is a second, formed on either side by the caninus and triangularis, which cross each other at the angle of the mouth; those from the caninus passing to the lower lip, and those from the triangularis to the upper lip, along which they run, to be inserted into the skin near
241:
Some of the buccinator fibers—namely, those near the middle of the muscle—decussate at the angle of the mouth, those arising from the maxilla passing to the lower lip, and those from the mandible to the upper lip. The uppermost and lowermost fibers of the buccinator pass across the lips from side to
253:
The interval between the two medial bands corresponds with the depression, called the philtrum, seen on the lip beneath the septum of the nose. The additional fibers for the lower lip constitute a slip m. incisivus labii inferioris on either side of the middle line; this arises from the mandible,
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Finally, fibers occur by which the muscle is connected with the maxilla and the septum of the nose above and with the mandible below. In the upper lip, these consist of two bands, lateral and medial, on either side of the middle line; the lateral band m. incisivus labii superioris arises from the
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alveolar border of the maxilla, opposite the lateral incisor tooth, and arching lateralward is continuous with the other muscles at the angle of the mouth; the medial band m. nasolabialis connects the upper lip to the back of the septum of the nose.
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Babies are occasionally born without one or both sides of this particular muscle, resulting in a slight droop to the affected side of the face.
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Saladin, "Anatomy & Physiology: The Unity of Form and
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lateral to the
Mentalis, and intermingles with the other muscles at the angle of the mouth.
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Knowledge articles incorporating text from the 20th edition of Gray's
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381:. TheFreeDictionary : Mosby's Dental Dictionary, 2nd edition. 2008
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222:. This muscle closes the mouth and puckers the lips when it contracts.
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The orbicularis oris is not a simple sphincter muscle like the
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360:. BBC : Science & Nature : Human Body & Mind
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Scheme showing arrangement of fibers of orbicularis oris
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is a complex of muscles in the lips that encircles the
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at Human
Anatomy Online, SUNY Downstate Medical Center
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238:and form the deeper stratum of the orbicularis.
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441:(Flash) Animation of movements of the muscle
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331:This article incorporates text in the
772:Levator labii superioris alaeque nasi
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435:Picture of the circular-shaped muscle
422:Roche Lexicon - illustrated navigator
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291:Muscles of the head, face, and neck
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112:because it is used to pucker the
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418:"Anatomy diagram: 25420.000-1"
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105:It is sometimes known as the
1050:Muscles of the head and neck
728:Levator palpebrae superioris
540:Levator palpebrae superioris
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339:of the 20th edition of
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214:used in the playing of all
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857:Depressor labii inferioris
424:. Elsevier. Archived from
242:side without decussation.
175:Anatomical terms of muscle
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379:"orbicularis oris muscle"
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132:musculus orbicularis oris
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799:Levator labii superioris
411:Anatomy figure: 23:02-03
279:Muscles of head and neck
197:orbicularis oris muscle
210:It is also one of the
77:superior labial artery
73:Inferior labial artery
988:Inferior longitudinal
983:Superior longitudinal
852:Depressor anguli oris
723:Corrugator supercilii
258:Clinical significance
767:Depressor septi nasi
716:depressor supercilii
439:Facial Muscles - BBC
433:Facial Muscles - BBC
220:woodwind instruments
62:Skin around the lips
1060:Human head and neck
794:Levator anguli oris
203:. It is not a true
579:sphenomandibularis
358:"Muscles - Facial"
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867:Transversus menti
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711:Orbicularis oculi
694:Occipitofrontalis
668:Temporoparietalis
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266:Additional images
232:orbicularis oculi
216:brass instruments
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90:Cranial nerve VII
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144:A04.1.03.023
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885:Soft palate
804:Zygomaticus
699:occipitalis
557:Masticatory
488:Extraocular
121:Identifiers
1039:Categories
993:Transverse
950:Hyoglossus
839:Buccinator
608:masseteric
574:Temporalis
385:2010-10-03
364:2010-10-03
321:References
236:buccinator
976:Intrinsic
938:Extrinsic
704:frontalis
661:posterior
646:Auricular
586:Pterygoid
226:Structure
218:and some
205:sphincter
58:Insertion
998:Vertical
862:Mentalis
834:Risorius
750:Procerus
656:superior
651:anterior
613:temporal
569:Masseter
523:inferior
518:superior
506:superior
501:inferior
337:page 384
309:See also
51:mandible
1029:Anatomy
903:levator
755:Nasalis
591:lateral
533:lateral
496:Oblique
478:of the
476:Muscles
212:muscles
108:kissing
101:Actions
47:Maxilla
36:Details
1015:Portal
930:Tongue
898:tensor
682:eyelid
629:Facial
603:Fascia
596:medial
528:medial
513:Rectus
345:(1918)
195:, the
110:muscle
68:Artery
42:Origin
814:minor
809:major
782:Mouth
678:Scalp
335:from
201:mouth
179:[
168:46841
127:Latin
85:Nerve
742:Nose
480:head
156:2073
139:TA98
114:lips
75:and
49:and
638:Ear
191:In
163:FMA
151:TA2
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468:e
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