World Library  
Flag as Inappropriate
Email this Article

Frenulum of tongue

Article Id: WHEBN0002831210
Reproduction Date:

Title: Frenulum of tongue  
Author: World Heritage Encyclopedia
Language: English
Subject: Tongue, Raphe, Frenuloplasty of tongue, Frenulum breve, Mucous gland
Collection:
Publisher: World Heritage Encyclopedia
Publication
Date:
 

Frenulum of tongue

Frenulum of tongue
The mouth cavity. The apex of the tongue is turned upward, and on the right side a superficial dissection of its under surface has been made. (Frenulum labeled at center right.)
Sagittal section of nose mouth, pharynx, and larynx. (Frenulum linguae is topmost label at right.)
Details
Latin frenulum linguae
Identifiers
MeSH A14.549.885.431
Dorlands
/Elsevier
f_16/12379176
Anatomical terminology

The frenulum of tongue or tongue web (also lingual frenulum or frenulum linguæ) is a small fold of mucous membrane extending from the floor of the mouth to the midline of the underside of the tongue.

Contents

  • Development 1
  • Anatomy 2
  • Disorders 3
  • See also 4
  • Footnotes 5

Development

The tongue starts to develop at about 4 weeks. The tongue originates from the first, second, and third pharyngeal arches which induces the migration of muscles from the occipital myotomes. A U-shaped sulcus develops in front of and on both sides of the oral part of the tongue. This allows the tongue to be free and highly mobile, except at the region of the lingual frenulum, where it remains attached. Disturbances during this stage cause tongue tie or ankyloglossia. During the sixth week of gestation, the medial nasal processes approach each other to form a single globular process that in time gives rise to the nasal tip, columella, prolabium, frenulum of the upper lip, and the primary palate.[1] As the tongue continues to develop, frenulum cells undergo apoptosis, retracting away from the tip of the tongue, and increasing the tongue's mobility.[2]

During early gestation (as early as 4 weeks) the lingual frenulum serves as a guide for the forward growth of the tongue. After birth the tip of the tongue continues to elongate, giving the impression of the frenulum retracting, though in reality this has been going on for some time before birth. This is what gives the impression that the frenulums of some previously tongue-tied infants will "stretch" with age and growth. In reality the tongue often just grows beyond the frenulum, although some do also stretch and/or rupture after mild accidents. Many others continue to cause problems throughout life, unless corrected.[3]

Anatomy

The thin strip of tissue that runs vertically from the floor of the mouth to the undersurface of the tongue is called the lingual frenulum. It tends to limit the movement of the tongue, and in some people, it is so short that it actually interferes with speaking.

The base of the frenulum contains a "V" shaped hump of tissue in the floor of the mouth which houses a series of saliva gland ducts. The two largest ducts are in the center just in front of the attachment of the lingual frenulum and are called Wharton's Ducts. They empty the submandibular (submaxillary) and sublingual salivary glands. These ducts can be quite active in some persons, and upon occasion, a considerable amount of saliva may erupt from them while talking, eating, yawning, or cleaning the teeth in a process known as gleeking. The sublingual saliva glands empty through a series of tiny ducts in the tissue on either side of Wharton's ducts. The tongue is attached to the floor of the oral cavity by the frenulum.

Superficial veins run through the base of the frenulum known as varicosities. Their presence is normal, becoming more and more prominent as the patient ages.[4]

Disorders

Ankyloglossia

Ankyloglossia, also known as tongue-tie, is a congenital anomaly characterised by an abnormally short lingual frenulum; when severe, the tip of the tongue cannot be protruded beyond the lower incisor teeth.[5]

Additionally, an abnormally short frenulum in infants can be a cause of breastfeeding problems, including sore and damaged nipples and inadequate feedings.[6] The resultant trouble breastfeeding results in slower weight gain in affected infants.[7]

The absence of the inferior labial (100% sensitivity; 99.4% specificity) and lingual frenulum (71.4% sensitivity; 100% specificity) was found to be associated with classical and hypermobility types of Ehlers-Danlos syndrome.[8]

In cunnilingus tongue, there is trauma to the lingual frenulum caused by friction between the tongue and the mandibular central incisor teeth during cunnilingus and other oral sexual activities.[9]

See also

Footnotes

  1. ^ "Basic Embryology of Head and Neck". Chicago Medical Center. 2009-08-14. Retrieved 2010-05-06. 
  2. ^ Human embryology made easy. Harwood Academic Publishers. 1998. 
  3. ^ "lingual frenulum". Everything2. 2002-03-23. Retrieved 2010-05-06. 
  4. ^ http://www.doctorspiller.com/oral%20anatomy.htm
  5. ^ "Division of ankyloglossia (tongue-tie) for breastfeeding". NICE, the National Institute for Health and Clinical Excellence. 2005-12-14. Retrieved 2008-12-25. 
  6. ^ "The importance of the identification of ankyloglossia (short lingual frenulum) as a cause of breastfeeding problems". J Hum Lact (NCBE) 6 (3): 113–5. 2005-12-14.  
  7. ^ "Sore Nipples and Slow Weight Gain Related to a Short Frenulum". SAGE. 1990. Retrieved 2010-06-06. 
  8. ^ "Absence of the inferior labial and lingual frenula in Ehlers-Danlos syndrome". The Lancet. 2001-05-22. Retrieved 2010-06-06. 
  9. ^ BW Neville, DD Damm, CM Allen, JE Bouquot (2002). Oral & maxillofacial pathology (2nd ed.). Philadelphia: W.B. Saunders. pp. 253–284.  
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
 
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
 
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.
 


Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.