Orbicularis oris muscle: Difference between revisions

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Line 1: {{Short description\|Kissing muscles}} {{Infobox muscle \| Name = Orbicularis oris Line 6 ⟶ 7: \| Insertion = Skin around the lips \| Blood = [[Inferior labial artery]] and [[superior labial artery]]. \| Nerve = [[Facial nerve\|~~cranial~~Cranial nerve VII]], [[buccal branch]] \| Action = It is sometimes known as the ''[[kiss]]ing muscle''<ref>{{ cite web \| title = orbicularis oris muscle \| url = http://medical-dictionary.thefreedictionary.com/orbicularis+oris+muscle \| publisher = TheFreeDictionary : Mosby's Dental Dictionary, 2nd edition \| year = 2008 \| access-date = 2010-10-03 }}</ref><ref>{{ cite web \| title = Muscles - Facial \| url = http://www.bbc.co.uk/science/humanbody/body/factfiles/facial/frontalis.shtml \| publisher = BBC : Science & Nature : Human Body & Mind \| access-date = 2010-10-03 }}</ref> because it is used to pucker the [[lip]]s. }} In [[human anatomy]], the '''orbicularis oris muscle''' is a complex of muscles in the lips that encircles the [[Human mouth\|mouth]].<ref>{{ cite web \| title = orbicularis oris muscle \| url = http://medical-dictionary.thefreedictionary.com/orbicularis+oris+muscle \| publisher = TheFreeDictionary : Mosby's Dental Dictionary, 2nd edition \| year = 2008 \| access-date = 2010-10-03 }}</ref> It is not a true [[sphincter]], oras was ~~circular~~once ~~muscle~~thought, ~~but~~as it is actually composed of four independent quadrants that interlace and give only an appearance of circularity.<ref>Saladin, "Anatomy & Physiology: The Unity of Form and Function". 5th edition. McGraw Hill. Page 330</ref> It is also one of the [[muscle]]s used in the playing of all [[brass instrument]]s and some [[woodwind instrument]]s. This muscle closes the mouth and puckers the lips when it contracts. ==~~Anatomy~~ Structure == 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. 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 [[buccinator]] and form the deeper stratum of the orbicularis. Line 57 ⟶ 58: [[Category:Muscles of the head and neck]] [[Category:Facial muscles]] [[Category:Human head and neck]]