Buccinator muscle 1416014 223546313 2008-07-04T15:32:00Z Slodave 301776 {{Muscle infobox | Name = Buccinator muscle | Latin = musculus buccinator | GraySubject = 108 | GrayPage = 384 | Image = buccinator.jpg | Caption = Buccinator outlined in red. | Image2 = | Caption2 = | Origin = from the [[alveolar processes]] of the [[maxillary bone]] and [[mandible]], [[pterygomandibular raphe]] | Insertion = in the fibres of the [[orbicularis oris]] | Blood = [[buccal artery]] | Nerve = [[buccal branch of the facial nerve]] (VII cranial nerve) | Action = The buccinator compresses the cheeks against the teeth and is used in acts such as blowing. It is an assistant muscle of [[mastication]] (chewing). | MeshName = | MeshNumber = | DorlandsPre = m_22 | DorlandsSuf = 12548520 | }} The '''buccinator''' is a thin quadrilateral muscle, occupying the interval between the [[maxilla]] and the [[mandible]] at the side of the face. ==Action== Its action is to pull back the angle of the mouth and to flatten the cheek area. ==Origin and insertion== It arises from the outer surfaces of the [[alveolar processes]] of the maxilla and [[mandible]], corresponding to the three [[molar teeth]]; and behind, from the anterior border of the [[pterygomandibular raphé]] which separates it from the [[Constrictor pharyngis superior]]. 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. ==Innervation== Motor innervation is from the facial nerve (cranial nerve VII), and sensory innervation is from the buccal branch of the trigeminal nerve (cranial nerve V). ==Additional images== <gallery> Image:Illu head neck muscle.jpg|Muscles of head and neck Image:Gray157.png|Left maxilla. Outer surface. Image:Gray176.png|Mandible. Outer surface. Side view. Image:Gray381.png|Scheme showing arrangement of fibers of Orbicularis oris. Image:Gray513.png|The internal carotid and vertebral arteries. Right side. Image:Gray778.png|Distribution of the maxillary and mandibular nerves, and the submaxillary ganglion. Image:Gray781.png|Mandibular division of the trifacial nerve. Image:Gray1201.png|The mouth cavity. The cheeks have been slit transversely and the tongue pulled forward. </gallery> ==External links== * {{GPnotebook|-845545395}} * {{MuscleLoyola|buc}} * {{eMedicineDictionary|Buccinator+muscle}} * {{RocheLexicon|05287.011-1}} * {{RocheLexicon|25420.000-1}} {{muscle-stub}} {{Gray's}} {{Muscles_of_head}} [[Category:Muscles of the head and neck]] [[ar:العضلة المبوقة]] [[de:Musculus buccinator]] [[es:Buccinador]] [[hu:Trombitásizom]] [[nl:Musculus buccinator]] [[ja:頬筋]] [[pl:Mięsień policzkowy]] [[sl:Bukcinatorna mišica]] [[sr:Образни мишић]] [[sh:Obrazni mišić]] [[fi:Poskilihas]]