Buccinator muscle

Buccinator muscle

Muscle infobox
Name = Buccinator muscle
Latin = musculus buccinator
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Caption = Buccinator outlined in red.


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).
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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

External links

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Look at other dictionaries:

  • buccinator muscle — noun a muscle that flattens the cheek and retracts the angle of the mouth • Syn: ↑cheek muscle, ↑musculus buccinator • Hypernyms: ↑facial muscle • Part Holonyms: ↑cheek …   Useful english dictionary

  • buccinator muscle — musculus buccinator …   Medical dictionary

  • Buccinator — can refer to: * buccinator muscle * buccinator artery ( buccal in modern sources) * buccinator nerve ( buccal in modern sources) * buccinator lymph node …   Wikipedia

  • buccinator — See b. (muscle). * * * buc·ci·na·tor bək sə .nāt ər n a thin broad muscle forming the wall of the cheek and serving to compress the cheek against the teeth and to retract the angle of the mouth called also buccinator muscle * * * n. a muscle of… …   Medical dictionary

  • buccinator crest — a ridge running from the base of the coronoid process of the mandible to a point near the last molar tooth, giving attachment to the buccinator muscle …   Medical dictionary

  • buccinator fascia — fascia buccopharyngea [TA] buccopharyngeal fascia a fibrous membrane forming the external covering of the constrictor muscles of the pharynx, and passing forward superiorly to the surface of the buccinator muscle …   Medical dictionary

  • Muscle — is the tissue of the body which primarily functions as a source of power. There are three types of muscle in the body. Muscle which is responsible for moving extremities and external areas of the body is called "skeletal muscle." Heart… …   Medical dictionary

  • Muscle Buccinateur — Le muscle buccinateur est un muscle de la joue. Il a la forme d un rectangle. Il s insère sur l os maxillaire en haut et l os mandibule en bas. Il est commandé par le nerf facial, et permet lors de sa contraction de vider le contenu de la bouche …   Wikipédia en Français

  • Buccinator — Buc ci*na tor, n. [L., a trumpeter, fr. bucinare to sound the trumpet.] (Anat.) A muscle of the cheek; so called from its use in blowing wind instruments. [1913 Webster] …   The Collaborative International Dictionary of English

  • buccinator — [buk′sə nāt΄ər] n. [L, trumpeter < pp. of buccinare, to blow a trumpet < buccina, a trumpet < * boucana < bos, ox, COW1 + canere, to sing: see CHANT] the flat muscle of the cheek, which compresses it and retracts the corners of the… …   English World dictionary

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