Buccinator muscle

Buccinator muscle
Buccinator.jpg
Buccinator outlined in red.
Details
Originfrom the alveolar processes of maxilla and mandible, and temporomandibular joint
Insertionin the fibers of the orbicularis oris
Arterybuccal artery
Nervebuccal branch of the facial nerve (VII cranial nerve)
ActionsThe buccinator compresses the cheeks against the teeth and is used in acts such as blowing. It is an assistant muscle of mastication (chewing) and in neonates it is used to suckle.
Identifiers
LatinMusculus buccinator[1]
A04.1.03.036
46834
Anatomical terms of muscle

The buccinator (ər/[2][3]) is a thin quadrilateral muscle occupying the interval between the maxilla and the mandible at the side of the face. It forms the anterior part of the cheek or the lateral wall of the oral cavity.[4]

Structure

It arises from the outer surfaces of the alveolar processes of the maxilla and mandible, corresponding to the three pairs of molar teeth; and behind, from the anterior border of the pterygomandibular raphé which separates it from the constrictor pharyngis superior. It is attached upon the buccinator crest as far forward as the first molar tooth.[5]

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 buccal branch of the facial nerve (cranial nerve VII). Sensory innervation is supplied by the buccal branch (one of the muscular branches) of the mandibular part of the trigeminal (cranial nerve V).[6]

Other Languages
العربية: عضلة مبوقة
lietuvių: Bukcinatorius
日本語: 頬筋
português: Músculo bucinador
русский: Щёчная мышца
slovenščina: Bukcinatorna mišica
српски / srpski: Образни мишић
srpskohrvatski / српскохрватски: Obrazni mišić
suomi: Poskilihas
українська: Щічний м'яз