Bucinator muscle

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 in the mandible, it is attached upon the bucinator crest posterior to the third molar; and behind, from the anterior border of the pterygomandibular raphe 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 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).

Function

Its purpose is to pull back the angle of the mouth and to flatten the cheek area, which aids in holding the cheek to the teeth during chewing. This action causes the muscle to keep food pushed back on the occlusal surface of the posterior teeth, as when a person chews. By keeping the food in the correct position when chewing, the bucinator assists the muscles of mastication.

It aids whistling and smiling, and in neonates it is used to suckle.

Structures piercing the bucinator

1. Parotid duct (Stenson's duct)
2. Molar glands of cheeks
3. Buccal branch of mandibular nerve

Etymology

A buccinator in classical Latin is a trumpeter, or more precisely, the person who blows the bucina. The name bucina could refer in Roman antiquity to a crooked horn or trumpet, a shepherd's horn or a war-trumpet. Despite its similarity to the classical Latin name for cheek, i.e. bucca, the words bucinator, bucina, and bucinere (to blow the bucina) are not related to bucca, hence some disapproved the spelling buccinator. Although the name bucinator is not derived from bucca, this muscle is also called musculus buccae or musculus buccalis in Latin and muscle of the cheek in English.

The first edition of Terminologia Anatomica, and preceding editions (Nomina Anatomica) dictate the spelling 'buccinator' with double 'c', with the exception of the Jena Nomina Anatomica, authorized in 1935, which writes 'musculus bucinatorius' with a single 'c'. The second edition of Terminologia Anatomica published in 2019 adopted the spelling 'bucinator' with a single 'c'.

Ancient Greek βουκινάτωρ/βυκανητής/βυκανιστής (trumpeter ), βυκανη (spiral trompet/horn ) and βουκινίζειν/βυκινίζειν/βουινίζειν (blow the trumpet ) can be seen as translations or derivations from classical Latin bucinator, bucina and bucinare and not the other way around. In modern Greek the bucinator muscle is analogously called βυκανητής. --

Additional images

File:Sobo 1909 263.png File:Sobo 1909 262.png File:Sobo 1909 264.png File:Sobo 1909 266.png File:Gray157.png|Left maxilla, outer surface File:Gray176.png|Mandible, outer surface, side view File:Gray381.png|Scheme showing arrangement of fibers of orbicularis oris File:Gray513.png|The internal carotid and vertebral arteries, right side File:Gray778.png|Distribution of the maxillary and mandibular nerves and the submaxillary ganglion File:Gray781.png|Mandibular division of the trifacial nerve File:Gray1201.png|The mouth cavity: The cheeks have been slit transversely and the tongue pulled forward. File:Buccinator muscle animation small.gif|Position of buccinator muscle (red) File:Buccinator muscle lateral.png|Position of buccinator muscle (red) File:Buccinator muscle frontal.png|Position of buccinator muscle (red) File:Slide1vv.JPG|Buccinator muscle

References

References

1. {{Terminologia Anatomica. A04.1.03.036
2. ''[[OED]]'' 2nd edition, 1989.
3. [http://www.merriam-webster.com/dictionary/buccinator Entry "buccinator"] in ''[http://www.merriam-webster.com/ Merriam-Webster Online Dictionary]''.
4. Illustrated Anatomy of the Head and Neck, Fehrenbach and Herring, Elsevier, 2012, page 91
5. [https://books.google.com/books?id=iVGbPei7gZ4C&dq=buccinator+crest&pg=PA47 Google Books] Woelfel's Dental Anatomy: Its Relevance to dentistry, Rickne C. Scheid, Julian B. Woelfel.
6. Grant's Dissector, Fourteenth Edition, page 204
7. Lewis, C.T. & Short, C. (1879). ''A Latin dictionary founded on Andrews' edition of Freund's Latin dictionary.'' Oxford: Clarendon Press.
8. Stieve, H. (1949). ''Nomina Anatomica. Zusammengestellt von der im Jahre 1923 gewählten Nomenklatur-Kommission, unter Berücksichtigung der Vorschläge der Mitglieder der Anatomischen Gesellschaft, der Anatomical Society of Great Britain and Ireland, sowie der American Association of Anatomists, überprüft und durch Beschluß der Anatomischen Gesellschaft auf der Tagung in Jena 1935 endgúltig angenommen.'' (4th edition). Jena: Verlag Gustav Fischer.
9. Schreger, C.H.Th.(1805). ''Synonymia anatomica. Synonymik der anatomischen Nomenclatur.'' Fürth: im Bureau für Literatur.
10. F.D. Foster. (1891–1893). "An illustrated medical dictionary. Being a dictionary of the technical terms used by writers on medicine and the collateral sciences, in the Latin, English, French, and German languages". D. Appleton and Company.
11. Federative Committee on Anatomical Terminology (FCAT) (1998). ''Terminologia Anatomica''. Stuttgart: Thieme
12. International Anatomical Nomenclature Committee (1966). ''Nomina Anatomica''. Amsterdam: Excerpta Medica Foundation.
13. International Anatomical Nomenclature Committee (1977). ''Nomina Anatomica, together with Nomina Histologica and Nomina Embryologica''. Amsterdam-Oxford: Excerpta Med
14. International Anatomical Nomenclature Committee (1983). ''Nomina Anatomica, together with Nomina Histologica and Nomina Embryologica''. Baltimore/London: Williams & Wilkins
15. International Anatomical Nomenclature Committee (1989). ''Nomina Anatomica, together with Nomina Histologica and Nomina Embryologica''. Edinburgh: Churchill Livingstone.
16. "TA2 Viewer".
17. Triepel, H. & Stieve, H. (1936). ''Die anatomischen Namen. Ihre Ableitung und Aussprache. Anhang: Eigennamen, die früher in der Anatomie verwendet wurden.''(Achtzehnte Auflage). Berlin/Heidelberg:Springer-Verlag.
18. (2002). "The Roman bucina: a distinct musical instrument?". Historic Brass Society Journal.
19. Liddell, H.G. & Scott, R. (1940). ''A Greek-English Lexicon. revised and augmented throughout by Sir Henry Stuart Jones. with the assistance of. Roderick McKenzie.'' Oxford: Clarendon Press.
20. Schleifer, S.K. (Ed.) (2011). ''Corpus humanum, The human body, Le corps humain, Der menschliche Körper, Il corpo umano, El cuerpo humano, Ciało człowieka, Människokroppen, Menneskekroppen, Τό ανθρώπινο σῶμα, ЧЕЛОВЕК.'' FKG.