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]]