Hearing - Middle Ear Development: Difference between revisions
From Embryology
(→Middle) |
|||
Line 7: | Line 7: | ||
:{{Template:Hearing Links}} | :{{Template:Hearing Links}} | ||
== | ==Tympanic Cavity== | ||
* derived from first pharyngeal pouch | * derived from first pharyngeal pouch | ||
Line 17: | Line 15: | ||
* stalk of recess forms auditory tube(eustachian tube, pharyngotympanic tube) | * stalk of recess forms auditory tube(eustachian tube, pharyngotympanic tube) | ||
==Ossicles== | |||
[[File:Pharyngeal arch cartilages.jpg|thumb|Pharyngeal arch cartilages]] | [[File:Pharyngeal arch cartilages.jpg|thumb|Pharyngeal arch cartilages]] | ||
* develop from first and second pharyngeal arches | * develop from first and second pharyngeal arches |
Revision as of 12:24, 4 June 2010
Introduction
The middle ear ossicles (bones) are derived from 1st and 2nd arch mesenchyme. The space in which these bones sit is derived from the 1st pharyngeal pouch.
Tympanic Cavity
- derived from first pharyngeal pouch
- extends as tubotympanic recess - during week 5 recess contacts outer ear canal
- mesoderm between 2 canals forms tympanic membrane
- expands to form tympanic recess
- stalk of recess forms auditory tube(eustachian tube, pharyngotympanic tube)
Ossicles
- develop from first and second pharyngeal arches
- tympanic cavity enlarges to incorporate
- coats with epithelia
- first arch mesoderm
- tensor tympani muscle
- malleus and incus
- second arch mesoderm
- stapedius muscle and stapes
Middle Ear Genes - gooscoid, RARs, Prx1, Otx2, Hoxa1, Hoxb1, endothelian related molecules
Glossary Links
- Glossary: A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | Numbers | Symbols | Term Link
Cite this page: Hill, M.A. (2024, June 1) Embryology Hearing - Middle Ear Development. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Hearing_-_Middle_Ear_Development
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G