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GraySubject = 232 |
 
GraySubject = 232 |
 
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Image = Gray923.png |
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Image = Gray921.png |
Caption = The [[cochlea]] and vestibule, viewed from above. |
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Caption = Interior of right osseous labyrinth. (Scala tympani labeled at right, inside [[cochlea]]. |
 
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Width = 300 |
 
Image2 = Cochlea-crosssection.png |
 
Image2 = Cochlea-crosssection.png |
Caption2 = Cross section of the cochlea. |
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Caption2 = Cross section of the cochlea (scala tympani labeled at bottom) |
 
System = |
 
System = |
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MeshName = Scala+Tympani |
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MeshNumber = A09.246.631.246.848 |
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DorlandsPre = s_03 |
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DorlandsSuf = 12721078 |
 
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'''Scala vestibuli''' is a [[perilymph]] filled cavity inside the [[cochlea]] of the [[inner ear]]. It is separated from the [[scala media]] by [[Reissner's membrane]] and extends from the [[oval window]] to the [[helicotrema]] where it joins [[scala tympani]].
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'''Scala tympani''' is one of the [[perilymph]]-filled cavities in the [[cochlear labyrinth]]. It is separated from the [[scala media]] by the [[basilar membrane]], and it extends from the [[round window]] to the [[helicotrema]], where it continues as [[scala vestibuli]].
   
==External links==
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The purpose of the perilymph-filled scala tympani and [[scala vestibuli]] is to transduce the movement of air that causes the [[tympanic membrane]] and the [[ossicles]] to vibrate, to movement of liquid and the [[basilar membrane]]. This movement is conveyed to the [[organ of Corti]] inside the scala media, composed of [[hair cell]]s attached to the basilar membrane and their [[stereocilia]] embedded in the [[tectorial membrane]]. The movement of the basilar membrane compared to the tectorial membrane causes the sterocilia to bend. They then [[Depolarization|depolarise]] and send impulses to the brain via the [[cochlear nerve]]. This produces the sensation of [[sound]].
* [http://www.kumc.edu/instruction/medicine/anatomy/histoweb/eye_ear/ear03.htm Slide from University of Kansas]
 
* [http://anatomy.iupui.edu/courses/histo_D502/D502f04/lecture.f04/Earf04/cochlea.jpg Diagram at IUPUI]
 
   
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==Additional images==
   
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<gallery>
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Image:Gray903.png|Transverse section of the cochlear duct of a fetal cat.
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Image:Gray923.png|The cochlea and vestibule, viewed from above.
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Image:Gray928.png|Diagrammatic longitudinal section of the cochlea.
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</gallery>
   
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==External links==
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* [http://www.kumc.edu/instruction/medicine/anatomy/histoweb/eye_ear/ear03.htm Slide] from [[University of Kansas]]
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* [http://anatomy.iupui.edu/courses/histo_D502/D502f04/lecture.f04/Earf04/cochlea.jpg Diagram] at [[IUPUI]]
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* {{eMedicineDictionary|Scala+tympani}}
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* [http://faculty.une.edu/com/abell/histo/cochleaw.jpg Image] at [[University of New England, Maine]]
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{{anatomy-stub}}
 
{{Auditory system}}
 
{{Auditory system}}
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[[Category:Auditory system]]
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<!--
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[[ca:Rampa timpànica]]
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[[gl:Scala tympani]]
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-->
 
[[Category:Auditory system]]
 
[[Category:Auditory system]]

Latest revision as of 22:23, March 31, 2010

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Scala tympani
Gray921
Interior of right osseous labyrinth. (Scala tympani labeled at right, inside cochlea.
Latin '
Gray's subject #232 1050
System
MeSH A09.246.631.246.848
Cochlea-crosssection
Cross section of the cochlea (scala tympani labeled at bottom)

Scala tympani is one of the perilymph-filled cavities in the cochlear labyrinth. It is separated from the scala media by the basilar membrane, and it extends from the round window to the helicotrema, where it continues as scala vestibuli.

The purpose of the perilymph-filled scala tympani and scala vestibuli is to transduce the movement of air that causes the tympanic membrane and the ossicles to vibrate, to movement of liquid and the basilar membrane. This movement is conveyed to the organ of Corti inside the scala media, composed of hair cells attached to the basilar membrane and their stereocilia embedded in the tectorial membrane. The movement of the basilar membrane compared to the tectorial membrane causes the sterocilia to bend. They then depolarise and send impulses to the brain via the cochlear nerve. This produces the sensation of sound.

Additional imagesEdit

External linksEdit

|}

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