Difference between revisions of "Sensory - Balance Development"

From Embryology
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* Auditory component - Otic vesicle and neural crest (ectoderm)
 
* Auditory component - Otic vesicle and neural crest (ectoderm)
 
* Vestibular component - Otic vesicle and neural crest (ectoderm)
 
* Vestibular component - Otic vesicle and neural crest (ectoderm)
 +
 +
[[File:Stage13 otocyst.jpg|thumb|Stage 13 otocyst]]
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[[File:Stage22 ear.jpg|thumb|Stage 22 ear]]
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* The inner ear is derived from a pair of surface sensory placodes (otic placodes) in the head region.
 +
* These placodes fold inwards forming a depression, then pinch off entirely from the surface forming a fluid-filled sac or vesicle (otic vesicle, otocyst).
 +
* The vesicle sinks into the head mesenchyme some of which closely surrounds the otocyst forming the otic capsule.
 +
* The otocyst finally lies close to the early developing hindbrain (rhombencephalon) and the developing vestibulo-cochlear-facial ganglion complex.
 +
 +
'''Links:''' [[Hearing - Inner Ear Development|Inner Ear]]
  
 
== References ==
 
== References ==

Revision as of 00:19, 7 June 2010

Gray0924.jpg

Introduction

Hearing Links: Introduction | inner ear | middle ear | outer ear | balance | placode | hearing neural | Science Lecture | Lecture Movie | Medicine Lecture | Stage 22 | hearing abnormalities | hearing test | sensory | Student project

  Categories: Hearing | Outer Ear | Middle Ear | Inner Ear | Balance

Historic Embryology - Hearing 
Historic Embryology: 1880 Platypus cochlea | 1892 Vertebrate Ear | 1902 Development of Hearing | 1906 Membranous Labyrinth | 1910 Auditory Nerve | 1913 Tectorial Membrane | 1918 Human Embryo Otic Capsule | 1918 Cochlea | 1918 Grays Anatomy | 1922 Human Auricle | 1922 Otic Primordia | 1931 Internal Ear Scalae | 1932 Otic Capsule 1 | 1933 Otic Capsule 2 | 1936 Otic Capsule 3 | 1933 Endolymphatic Sac | 1934 Otic Vesicle | 1934 Membranous Labyrinth | 1934 External Ear | 1938 Stapes - 7 to 21 weeks | 1938 Stapes - Term to Adult | 1940 Stapes | 1942 Stapes - Embryo 6.7 to 50 mm | 1943 Stapes - Fetus 75 to 150 mm | 1946 Aquaductus cochleae and periotic (perilymphatic) duct | 1946 aquaeductus cochleae | 1948 Fissula ante fenestram | 1948 Stapes - Fetus 160 mm to term | 1959 Auditory Ossicles | 1963 Human Otocyst | Historic Disclaimer

Some Recent Findings

Inner Ear Labyrinth

  • Cochlea - Otic vesicle - Otic placode (ectoderm)
  • Semicircular canals - Otic vesicle - Otic placode (ectoderm)
  • Saccule and utricle - Otic vesicle - Otic placode (ectoderm)

Cranial Nerve VIII

  • Auditory component - Otic vesicle and neural crest (ectoderm)
  • Vestibular component - Otic vesicle and neural crest (ectoderm)
Stage 13 otocyst
Stage 22 ear
  • The inner ear is derived from a pair of surface sensory placodes (otic placodes) in the head region.
  • These placodes fold inwards forming a depression, then pinch off entirely from the surface forming a fluid-filled sac or vesicle (otic vesicle, otocyst).
  • The vesicle sinks into the head mesenchyme some of which closely surrounds the otocyst forming the otic capsule.
  • The otocyst finally lies close to the early developing hindbrain (rhombencephalon) and the developing vestibulo-cochlear-facial ganglion complex.

Links: Inner Ear

References


Reviews

Articles

  • Development of the mouse cochlea database (MCD). Santi PA, Rapson I, Voie A. Hear Res. 2008 Sep;243(1-2):11-7. Epub 2008 May 25. PMID:18603386 | PMC2628570
  • A mathematical model of human semicircular canal geometry: a new basis for interpreting vestibular physiology. Bradshaw AP, Curthoys IS, Todd MJ, Magnussen JS, Taubman DS, Aw ST, Halmagyi GM. J Assoc Res Otolaryngol. 2010 Jun;11(2):145-59. Epub 2009 Dec 1. PMID: 19949828

Search PubMed

May 2010 "Inner Ear Development" All (4027) Review (452) Free Full Text (750)

Search Pubmed: Balance Development | Vestibular Development |Semicircular Canal Development

External Links

Glossary Links

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Cite this page: Hill, M.A. (2021, May 17) Embryology Sensory - Balance Development. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Sensory_-_Balance_Development

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© Dr Mark Hill 2021, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G