2014 17.vestibulochlear organ

8/18/2019 2014 17.Vestibulochlear Organ

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The Vestibulocochlear Organ 前庭蜗器

Partsexternal ear 外耳

middle ear 中耳

internal ear 内耳：

Conduct the sound wave.

Contains the receptors of auditory

and vestibular organs.


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External ear

The external ear consists of

Auricle 耳廓external acoustic meatus

外耳道 tympanic membrane

鼓膜


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External ear

1. Auricle 耳廓

Helix 耳轮

Antihelix 对耳轮

external acoustic pore 外耳门Tragus 耳屏

auricular lobule 耳垂


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2. external acoustic meatus 外耳道 bony part 骨部： medial 2/3

cartilaginous part 软骨部： lateral 1/3

External ear


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External ear

3. tympanic membrane 鼓膜 Flaccid part 松弛部 : upper 1/

Tense part 紧张部 : lower 3/

!mbo of tympanic membrance

Cone of light 光锥

鼓膜脐

Malleolar stria 锤纹


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Consists of three parts: 1.Tympanic cavity 鼓室

2.Auditory tube 鼓!

3.astoid antrum "#$ and mastoid cells "#%

&

Middle ear


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1.Tympanic cavity鼓室

Position:An irregular air-filled cavity locates within the temporal bone, and lies betweenthe tympanic membrane and the inner ear .

It contains the auditory bones '%骨 , ligaments, muscles, vessels and nerves.


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Middle ear 中耳

!1"#alls o$ tympanic cavity%

1" #oof or tegmental #all :鼓室( tegmen tympani

2" inferior wall or &ugular #all )*+, : separates thecavity

from internal $ugular v.


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3) Anterior #all or carotid #all )-+, :

pper opening for tensor tympani m.

lower opening for auditory tube 鼓!鼓室.

!) 'osterior #all or mastoid #all "#, :

inlet of mastoid antrum: "#$/0.

Tympanic cavity 鼓室

")lateral #all or membranous #all 鼓膜,

: is formed by tympanic membrane.


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%" edial #all or labyrinthine #all 12, :

promontory 3

&enestra vestibuli 前庭4

&enestra cochleae 蜗4 : covered by secondary tympanic membrane.

56鼓膜 .

Middle ear

'rominence of facial canal. 789!:


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( 2; content o$ tympanic cavity 1) auditory ossicles '%骨：

malleus 锤骨

incus

stapedius =骨>


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2. Auditory tube 鼓!

Middle ear

(n childhood: shorter) #ider and more

hori*ontal than in adult.

3. Mastoid antrum "#$ and mastoid cells"#%&

mastoid cells"#%&


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nternal ear 内耳

bony labyrinth 骨12

membranous labyrinth 膜12

'osition: lies in the petrous part of the temporal bone

and consists of two parts.


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nternal ear 内耳

The membranous labyrinth is $ormed by membranoussacs and ducts( is contained within bony labyrinth.

The membranous labyrinth is

filled with endolymph 内?@ .

The space between the

membranous and bony

labyrinth is filled with

perilymph 外?@ .


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+ochlea 耳蜗Vestibule 前庭

,ony semicircular canals 骨AB!


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)1" +ochlea 耳蜗 :

+ochlear spiral canal 蜗CD! odiolus 蜗E

Osseous spiral lamina 骨CDF

-cala vestibuli 前庭G

-cala tympani 鼓G

odiolus

-cala vestibuli

-cala tympani


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)2" Vestibule前庭 !n its lateral "all

fenestra #estibuli 前庭4 fenestra coc$leae 蜗4


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*nterior semicircularcanal

#osterior

semicircular canal

$ateral semicircular

canal

)3" ,ony semicircular canals骨AB! :

three in number( the ant.( post.( and lateral

simple bony crusH骨I

ampullar bony crura JK骨I

bony ampulla 骨JKcommon bony crus L骨I


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2. embranous labyrinth 膜12

!1" +ochlear duct 蜗! % in cochlear spiral canal

!2" tricle MNO and saccule PO % in vestibule

!3" -emicircular ducts 膜AB! %


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蜗管

、椭圆囊

膜半规管

球囊

saccule %tricle

&oc$lear duct

'emicircular ducts


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(1) +ochlear duct 蜗! :

superior "all : vestibular wall 前庭,

inferior "all : basilar membrane QR膜 spiral organ CD器S %orti 器;

lateral "all:

前庭,

外T,

basilar membraneQR膜

spiral organ CD器S &orti 器;

labyrinth 膜122. embranous labyrinth 膜12


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receptors of balance( respond to

linear acceleration and deceleration UVWXYZX[-

(2) %tricle and saccule MNOYPO :

macula utricli MNO\ macula sacculiPO\

embranous labyrinth 膜12


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(3) 'emicircular ducts 膜AB! :membranous ampullae 膜JK

crista ampullaris JK]：

embranous labyrinth 膜12

receptor of balance, which respondto rotation of the head


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$e estibulococ$lear !rgan

nternal acoustic meatus 内'道 structures passing through it

*acial ner#e

#estibulococ$lear ner#e

#essels of labyrint$


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+onduction o$ sound声波的传导途径

&. ^_ Air conducti#e pat$"ay：

brain

'.骨_ ： `abcUde-f骨ghi蜗!内?@/e-gjkl mQR膜n/CD器ghi'op

qrs^_Y骨_tuvw

tympanic membrane chain o$ auditory ossicles

$enestra vestibuli perilymph #ithin the scala vestibuli

endolymph #ithin cochlear duct spiral organ

nerve impulse vestibulocochlear n.

the external acoustic meatusthe sound #ave


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/eceptors o$ balance /eceptor o$ hearing

,ony labyrinth% ,ony semicircular canals

Vestibule +ochlea

embranous

labyrinth ： +ochlear duct-emicircular ducts triclex

saccule

/eceptors： crista ampullaris spiral organ acula sacculi

acula

utricli

The summary

2014 17.vestibulochlear organ

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