Tongue Development: Difference between revisions
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Revision as of 23:34, 12 April 2010
Introduction
The tongue's embryonic orgin is derived from all pharyngeal arches contributing different components. As the tongue develops "inside" the floor of the oral cavity, it is not readily visible in the external views of the embryonic (Carnegie) stages of development. Tongue muscle cells originate from somites, while muscles of mastication derive from the unsegmented somitomeres. This current page gives a brief overview of early tongue development.
These notes cover development of the muscular tongue, not the sense of taste.
Links: original Head and Neck Development - Tongue page | original Tongue Taste Development page
Some Recent Findings
Pharyngeal Arch Contributions
The tongue has contributions from all pharyngeal arches which changes with time. The tongue initially begins as swelling rostral to foramen cecum, the median tongue bud.
- Arch 1 - oral part of tongue (anterior 3/2)
- Arch 2 - initial contribution to surface is lost
- Arch 3 - pharyngeal part of tongue (posterior 1/3)
- Arch 4 - epiglottis and adjacent regions
Tongue Muscles
Tongue muscles originate from the somites. Tongue muscles develop before masticatory muscles and is completed by birth.
Masticatory muscles (MM) originate from the somitomeres. These muscles develop late and are not complete even at birth.
Developing muscle fibers within the tongue. Note the multinucleated appearance of each muscle fiber and their overall organization. Muscle goes through the same developmental changes as other skeletal muscle.
See also reference: Yamane A. Embryonic and postnatal development of masticatory and tongue muscles. Cell Tissue Res. 2005 Jul 23;:1-7
References
Articles
- Development of the fetal tongue between 14 and 26 weeks of gestation: in utero ultrasonographic measurements. Achiron R, Ben Arie A, Gabbay U, Mashiach S, Rotstein Z, Lipitz S. Ultrasound Obstet Gynecol. 1997 Jan;9(1):39-41. PMID: 9060129
Search PubMed: Tongue Development
Glossary Links
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Cite this page: Hill, M.A. (2024, May 23) Embryology Tongue Development. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Tongue_Development
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G
