Sensory - Taste Development: Difference between revisions
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Cranial ganglia VII, IX and X sensory neurons have dual embryonic origins | Cranial ganglia VII, IX and X sensory neurons have dual embryonic origins | ||
* epibranchial placodes - gustatory neurons | * epibranchial placodes - gustatory neurons | ||
* cranial neural crest - general epithelial innervation to the oral cavity | |||
(text based on paper abstract) | |||
== References == | == References == | ||
Revision as of 00:03, 2 September 2010
Introduction
These notes introduce the development of the sense of taste which can divided into five basic tastes: bitter, salty, sweet, umami (savoury) and sour. Current research appears to have displaced the historic concept of a tongue "map".
A study in rat suggests that neonatal changes in circumvallate papillae may result in postnatal changes in "taste".[3] In frogs, a large taste disc (TD) is the largest vertebrate gustatory organ. Postnatally, the sense of taste is also closely related to the sense of smell.
| Taste Links: Introduction | Student project | Tongue Development | Category:Taste | ||
|
| Senses Links: Introduction | placode | Hearing and Balance hearing | balance | vision | smell | taste | touch | Stage 22 | Category:Sensory |
Some Recent Findings
- [4]"Mammalian taste buds have properties of both epithelial and neuronal cells, and are thus developmentally intriguing. Taste buds differentiate at birth within epithelial appendages, termed taste papillae, which arise at mid-gestation as epithelial thickenings or placodes. ...we demonstrate that Shh-expressing embryonic taste placodes are taste bud progenitors, which give rise to at least two different adult taste cell types, but do not contribute to taste papillae. Strikingly, placodally descendant taste cells disappear early in adult life."
Gustatory cranial sensory neurons
Embryonic origin of gustatory cranial sensory neurons.[5]
- Cranial nerves VII, IX and X provide both gustatory (taste) and non-gustatory (touch, pain, temperature) innervation to the oral cavity of vertebrates.
- Gustatory neurons innervate taste buds and project centrally to the rostral nucleus of the solitary tract (NTS)
- neurons providing general epithelial innervation to the oropharynx project to non-gustatory hindbrain regions (spinal trigeminal nucleus)
Cranial ganglia VII, IX and X sensory neurons have dual embryonic origins
- epibranchial placodes - gustatory neurons
- cranial neural crest - general epithelial innervation to the oral cavity
(text based on paper abstract)
References
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Cite this page: Hill, M.A. (2024, April 25) Embryology Sensory - Taste Development. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Sensory_-_Taste_Development
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G
