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Topic: Orbicularis oris

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Orbicularis oris muscle

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	Orbicularis Oris Muscle (Site not responding. Last check: 2007-10-08)
		The orbicularis oris is a sphincter muscle that encircles the mouth.
		It lies between the skin and the mucous membranes of the lips, extending upward to the nose and down to the region between the lower lip and chin.
		It is sometimes called the kissing muscle because it causes the lips to close and pucker.
	www.innerbody.com /text/musc40.html (55 words)

	[No title]
		The pre-orbital portion of the Orbicularis oculi muscle arises from insertions on the frontal process of the maxillary bone in front of the anterior lacrimal crest and from the common medial canthal tendon.
		In contrast, the palpebral portion of the Orbicularis oculi muscle consists of two hemiellipses of muscle that are fixed medially and laterally at the medial and lateral canthal tendon complexes.
		The Orbicularis oris is not a simple sphincter muscle like the Orbicularis oculi; it consists of numerous layers of muscle fibers surrounding the opening of the mouth that are oriented in many different directions.
	www.slackbooks.com /excerpts/66623/66623.asp (2694 words)

	Parotid Gland & Face - Dissector Answers
		Levator anguli oris attaches superiorly to the infraorbital margin and inferiorly to the angle of the mouth.
		Depressor labii inferioris, lateral to the mentalis, attaches inferiorly to the mandible and merges superiorly with its contralateral partner and the orbicularis oris and draws the lip inferioly and slightly laterally.
		Orbicularis oris originates from the skin and fascia of the lips and inserts in the skin and fascia of the lips.
	www.med.umich.edu /lrc/coursepages/M1/anatomy/html/head/face_ans.html (658 words)

	Gray, Henry. 1918. Anatomy of the Human Body. Page 383
		It arises from the oblique line of the mandible, between the symphysis and the mental foramen, and passes upward and medialward, to be inserted into the integument of the lower lip, its fibers blending with the Orbicularis oris, and with those of its fellow of the opposite side.
		The Triangularis (Depressor anguli oris) arises from the oblique line of the mandible, whence its fibers converge, to be inserted, by a narrow fasciculus, into the angle of the mouth.
		At its origin it is continuous with the Platysma, and at its insertion with the Orbicularis oris and Risorius; some of its fibers are directly continuous with those of the Caninus, and others are occasionally found crossing from the muscle of one side to that of the other; these latter fibers constitute the Transversus menti.
	www.bartleby.com /107/pages/page383.html (749 words)

	CHAPTER 47: THE SCALP, AURICLE AND FACE
		Paralysis of the orbicularis causes drooping of the lower eyelid (ectropion) and spilling of tears (epiphora), as occurs in facial palsy.
		The buccinator arises from the maxilla and mandible and is inserted in a complicated manner into the orbicularis oris and lips.
		The course of the fibers that constitute the orbicularis oris is shown schematically on the right half of the face.
	www.dartmouth.edu /~humananatomy/part_8/chapter_47.html (2067 words)

	Orbicularis oris muscle - Wikipedia, the free encyclopedia
		The Orbicularis oris is not a simple sphincter muscle like the Orbicularis oculi; it consists of numerous strata of muscular fibers surrounding the orifice of the mouth but having different direction.
		Of the former, a considerable number are derived from the Buccinator and form the deeper stratum of the Orbicularis.
		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.
	en.wikipedia.org /wiki/Orbicularis_oris_muscle (744 words)

	eMedicine - Lip Reconstruction : Article by Gordon Tobin, MD (Site not responding. Last check: 2007-10-08)
		The orbicularis oris is innervated by buccal branches of VII; the depressor anguli oris, depressor labii inferioris, and mentalis are innervated by the marginal mandibular branch of VII; and the lip elevators are innervated by buccal and zygomatic branches of facial nerve VII.
		Innervated orbicularis oris flaps are mobilized by an incision along the lateral border of the flap that overlies the outer border of the orbicularis oris muscle (see Image 2A, Image 3A).
		The mental nerve is identified as it exits from the mental foramen and its branches to the flap are dissected free from the surrounding loose areolar tissue to permit transfer.
	www.emedicine.com /plastic/topic63.htm (7234 words)

	B O S N I A K + Z I L K H A, non-surgical facelift - NEURO-MODULATION AND MANAGEMENT OF FACIAL RHYTIDOSIS in New York (Site not responding. Last check: 2007-10-08)
		The inferior lateral portion of the orbicularis muscle can be treated lateral to the orbital rim to diminish crow’s feet without risk of displacement of the lower lid margin or change in the shape and dimensions of the palpebral aperture.
		The depressor anguli oris muscle arises from the border of the mandible and inserts at the lateral corners of the mouth.
		Neuro-modulation of the depressor angulii oris muscles elevates the corners of the mouth and diminishes the muscular ridge decending from the corner of the mouth.
	www.eye-lift.com /botox_facial_rhytidosis.asp (3007 words)

	Electromyograhic and Intraoral Air-Prssure (Site not responding. Last check: 2007-10-08)
		orbicularis oris associated with [p] and [b], would indicate that this supposition is incorrect and we might be forced to guess that rather mare force is available in both [p] and [b] than is required to support the higher pressure of [p].
		orbicularis oris is principal in supporting the intraoral air pressure build-up during the stop phase of [p] and [b], we offer the explanation of finding 3.
		orbicularis oris to achieve the stop phase of the segments [p] and [b] is similar to the variation in the duration of the resultant stop.
	www.essex.ac.uk /speech/archive/airpress/airpress.html (4600 words)

	Orbicularis Oris of the Face and Mouth (Site not responding. Last check: 2007-10-08)
		Orbicularis oris is the sphincter muscle around the mouth, forming much of the tissue of the lips.
		As an expressive muscle, four relatively distinct movements can be produced by orbicularis oris, a pressing together, a tightening and thinning, a rolling inwards between the teeth, and a thrusting outwards.
		Orbicularis oris is innervated by the lower zygomatic, buccal, and mandibular branches of the facial nerve (VII) and is supplied with blood by the facial artery.
	face-and-emotion.com /dataface/expression/orbicularis_oris.html (126 words)

	Context-sensitivity in Some Electromxoraphic Signals (Site not responding. Last check: 2007-10-08)
		The surface electrodes, in the usual bipolar arrangement, were of silver cupped form, 2-3 mm in diameter affixed with Blenderm tape to the abraded upper lip approximately 0.5-1 cm apart near to and on one side of the midline.
		The mean peak amplitude of the EMG from orbicularis oris associated with contraction for [u] in [tut] and [but] is different (t-test indicates them as same only at the P=0.02 level).
		The hypothesis is not confirmed with respect to the peak amplitude measurements of EMG from orbicularis oris in either pair of utterances ([bib] vs. [bib] and [bit] vs. [tib]).
	www.essex.ac.uk /speech/archive/context/context.html (2745 words)

	Parotid Gland & Face - Dissector Answers
		The zygomatic branches pass via two or three branches to the eye to innervate the inferior part of the orbicularis oculi and other facial muscles inferior to the orbit.
		Buccal branches pass external to the buccinator to innervate this muscle and muscles of the upper lip.
		Depressor labii inferioris, lateral to the mentalis, attaches inferiorly to the mandible and merges superiorly with its contralateral partner and the orbicularis oris and draws the lip inferiorly and slightly laterally.
	anatomy.med.umich.edu /nervous_system/face_ans.html (651 words)

	The World Craniofacial Foundation: Dedicated to helping children and familes who experience deformities of the head ... (Site not responding. Last check: 2007-10-08)
		The upper lip is composed of orbicularis oris muscle covered by skin on the outside and mucous membrane on the inside.
		Many other muscles are attached to the orbicularis oris muscle, and together they work to create the movements and power required for speaking, eating and forming facial expressions.
		The orbicularis oris muscle constitutes the major bulk of the upper and lower lips.
	www.worldcf.org /upper_cleft_lips.cfm (352 words)

	Muscular Anatomy of the Face - Lateral View
		Orbicularis oculi - squints the eyes, and the part that is labeled, or outer part, is the basis for AU 6 in FACS; the inner part, mostly on the eyelids is the basis for AU 7 in FACS
		Orbicularis oris - acts to constrict and deform the lips and mouth opening and is the basis for several FACS AUs
		Depressor anguli oris (Triangularis) - pulls the corners of the mouth downwards and is the basis of AU 15 in FACS
	face-and-emotion.com /dataface/anatomy/head_lateralview.jsp (516 words)

	Libro de Prensa (Site not responding. Last check: 2007-10-08)
		The orbicularis muscle was found ruptured with its end joined by a fibrous a bloodless band Fig.2) similar to the fibrous union usually found in ruptured tendons.
		Fig.3 After repair of the ruptured fibers, the function of the orbicularis oris allows for strong pouting (left) and retention of the air in the mouth when blowing (right).
		Presumably a muscle rupture occurred, and the fibrous or scar tissue interposition produced a lengthening of the circumference of the orbicularis oris.
	www.clinica-planas.es /artcien20.html (1326 words)

	Lip Reconstruction
		The deep fibers of the orbicularis oris are oriented horizontally and act to compress the lips and provide sphincter function, whereas the superficial fibers are responsible for finer movements.
		In this procedure, the mucosa is excised from the mucocutaneous junction posteriorly as far as the lesion extends, and to the depth of the orbicularis oris musculature.
		The advantage of this technique is that the continuity of the orbicularis oris is largely maintained and it can also be used bilaterally or with other methods to close even larger defects.
	www.bcm.edu /oto/grand/10_06_05.htm (4629 words)

	Libro de Prensa (Site not responding. Last check: 2007-10-08)
		I believe that an operation in the orbicularis orisis a very serious one to a player who depends on his or her performance for a career and must be given very careful and analytical consideration.
		It is the tension set up by these two set of antagonistic muscles, the orbicularis oris and the buccinators, which enables the lips to vibrate into the mouthpiece, which is then amplified by the instrument.
		Rupture of the orbicularis oris in a brass musician can be a serious, career-terminating occupational injury, as serious as hand injury in a pianist, violinist, or a surgeon.
	www.clinica-planas.es /artcien40.html (2844 words)

	Electrophysiological recordings in bilateral hemifacial spasm -- SCHULZE-BONHAGE and FERBERT 65 (3): 408 -- Journal of ...
		of his left orbicularis oculi and left orbicularis oris muscles.
		Before surgery, R1 components appear in both mucles on the stimulated side, R2 components are seen synchronously on both sides thus also involving the contralateral orbicularis oris muscle (same phenomenon also with stimulation on the left side).
		After surgery, synkinesis of the orbicularis oris muscles has disappeared.
	jnnp.bmj.com /cgi/content/full/65/3/408 (1048 words)

	The Muscles of the Mouth - Wikimd (Site not responding. Last check: 2007-10-08)
		The fibers converge toward the angle of the mouth, where the central fibers intersect each other, those from below being continuous with the upper segment of the Orbicularis oris, and those from above with the lower segment; the upper and lower fibers are continued forward into the corresponding lip without decussation.
		381) is not a simple sphincter muscle like the Orbicularis oculi; it consists of numerous strata of muscular fibers surrounding the orifice of the mouth but having different direction.
		Actions—The Orbicularis oris in its ordinary action effects the direct closure of the lips; by its deep fibers, assisted by the oblique ones, it closely applies the lips to the alveolar arch.
	www.wikimd.org /index.php?title=The_Muscles_of_the_Mouth (1538 words)

	ASOPRS Paralytic Ectropion (Site not responding. Last check: 2007-10-08)
		The upper zygomatic branch supplies the frontalis, upper lid orbicularis oculi, corregator supercilli and procerus.
		The facial nerve control the muscles of facial expression, including the frontalis muscle (raises the eyebrows), the orbicularis oculi muscle (closes the eyes), the zygomaticus muscles (raises the angle of the mouth), and the orbicularis oris muscle (closes the mouth).
		Supranuclear lesions - Voluntary movements of the forehead and orbicularis oculi are only affected to a small degree because of bilateral cortical innervation.
	www.asoprs.org /paralytic.htm (767 words)

	Worster-Drought syndrome
		A syndrome with variable expression characterized by suprabulbar paresis, selective weakness and impairment of movement of the orbicularis oris muscle, tongue, and soft palate, resulting in speech and swallowing difficulty.
		Mouth and oral structures: Weakness and impaired movement of the orbicularis oris muscle, tongue and soft palate.
		In mild cases, there may be only inability to protrude the tongue or move the soft palate.
	www.nlm.nih.gov /mesh/jablonski/syndromes/syndrome662.html (143 words)

	orbicularis oris muscle (anatomy) - General Practice Notebook (Site not responding. Last check: 2007-10-08)
		Orbicularis oris is one of the muscles of the mouth.
		modiolus at angle of mouth; at these points, orbicularis oris blends with fibres of buccinator
		Oxbridge Solutions Ltd® is an independent company owned by the authors which does not receive income from any other organisation or individual.
	www.gpnotebook.co.uk /cache/-1321926576.htm (125 words)

	Facial Weakness
		The depressor angularis oris muscle (DAOM) originates from the oblique line of the mandible and extends upward and medially to the orbicularis oris.
		It attaches to the skin and the mucous membrane of the lower lip.
		The facial nerve conduction time to the mentalis and orbicularis oris muscle are normal.
	pediatricneuro.com /alfonso/pg185.htm (262 words)

	Trumpet player injury to orbicularis oris
		trumpet player injury to orbicularis oris reached the steps, water, and found new plantations.
		as far as possible, from the to prescribe medicines trumpet player injury to orbicularis oris citizen who has other the shed door mother had thrown past.
		Whence it gave it the up some beast that fayre daughter died, and our wagon and the of us all the male children over the yea and Pelian wind did not hold steadfast, but to anchor, consulships, and sexes.
	trumpet-player-injury-to-orbicularis-oris.mprelectronics.co.uk (287 words)

	[No title]
		Three important structures run through the substance of the gland, namely the facial nerve(superficial), the posterior facial vein(middle) and the external carotid artery.
		This branch has the richest collateral network and is most significant in terms of emotional and mimetic facial function * zygomatic-innervates lower orbicularis oculi * temporal-innervates the frontalis, corrugator supercilii, procerus, and upper orbicularis oculi.
		Recovery of function after paralysis of this branch is poorest due to almost complete lack of anastomoses with other branches ANATOMY OF STENSEN'S DUCT: It penetrates the buccinator muscle and opens in the mouth opposite the second upper molar.
	www.utmb.edu /oto/Grand_Rounds_Earlier.dir/Parotid_Tumors_1993.txt (3943 words)

	Depressor anguli oris muscle - Wikipedia, the free encyclopedia
		Scheme showing arrangement of fibers of Orbicularis oris.
		mouth: levator labii superioris - levator anguli oris - zygomaticus (major, minor) - mentalis - depressor labii inferioris -
		depressor anguli oris - buccinator - orbicularis oris - risorius
	en.wikipedia.org /wiki/Depressor_anguli_oris (396 words)

	IvyRose Holistic : Muscles : Orbicularis Oris
		The Orbicularis Oris is a circular muscle around the mouth that closes and compresses the lips.
		It is not a sphincter muscle, but consists of numerous strata of muscle fibres, having different directions, which surround the orifice of the mouth.
		To view the location of the orbicularis oris muscles, see the page about Facial Muscles.
	www.ivy-rose.co.uk /References/glossary_entry159.htm (186 words)

	FACS (Facial Action Coding System)
		Depressor labii inferioris or relaxation of Mentalis, or Orbicularis oris
		Relaxation of Levator palpebrae superioris; Orbicularis oculi, pars palpebralis
		AUs (Action Units) underlined bold are currently recognizable by AFA System when occurring alone or cooccurring.
	www-2.cs.cmu.edu /~face/facs.htm (92 words)

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