Post on 12-Apr-2018
transcript
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MOB TCD
Professor Emeritus Moira OBrienFRCPI, FFSEM, FFSEM (UK), FTCD
Trinity Coe!e
Du"in
Ear
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E#terna Ear
$ %uri&e$ One t'ir &artia!inous
$ To t'irs "ony
$ Meia tym*ani&
mem"rane
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+aematoma of EarMOB TCD
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$ Roof s'orter t'an foor$ ine it' &oumnar e*it'eium
$ Ceruminous !ans
$ Otis e#terna (simmers ear)
$ Pain on *uin! o"ue
E#terna EarMOB TCD
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Tym*ani& Mem"rane
$ T'ree ayers$ Outer s-uamous
$ Mie fi"rous
$ Defi&ient su*eriory
$ Fa&&i in u**er *ortion
$ +ane of maeous
em"ee in fi"rous ayer
$ Inner mu&ous mem"rane
$ Con&a.e ateray
$ Um"o
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$ Set at an!e //0'ori1onta$ 2er.e su**y
$ 3reat auri&uar
$ Post inferior -uarant fa&ia
$ Tym*ani& "ran&' of!osso*'aryn!ea
$ Fa&ia ner.e
$ Boo su**y
$ Su*erior more .as&uar
Tym*ani& Mem"raneMOB TCD
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Mie Ear
$ Bi&on&a.e$ Roof4 te!men tym*ani
$ Foor4 "one se*arates it
from &aroti &ana
$ Tym*ani& "ran&' of!osso*'aryn!ea ner.e
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$ atera a$ Tym*ani& mem"rane
$ E*itym*ani& re&ess
$ Meia a
$ atera semi&ir&uar &ana
$ Cana fa&ia ner.e
$ Promontory
$ Tym*ani& *e#us
Mie EarMOB TCD
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Mie Ear %nterior 5a
$ Cana tensor tym*animus&e
$ O*enin! Eusta&'ian tu"e
$ %nterior o*enin! for &'ora
tym*ani ner.e$ Bone se*arates it from
&aroti &ana
$ Caroti&otym*ani& ner.es
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Mie Ear Posterior 5a
$ O*enin! mastoi antrum$ Pyrami
$ O*enin! for sta*eius
mus&e
$ Cana for fa&ia ner.e
$ Posterior o*enin! of &'ora
tym*ani
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Contents Mie Ear
$ %ir$ Ossi&es
$ Tensor tym*ani mus&e
$ Sta*eius mus&e
$ C'ora tym*ani
$ Fa&ia ner.e
$ Caroti&otym*ani& ner.es
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$ Maeous$ +ea, ne&6, 'ane,
anterior *ro&ess,
*osterior *ro&ess
$ In&us, "oy on! ans'ort *ro&ess
Mie EarMOB TCD
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Sta*es
$ Sta*es$ 2e&6
$ %nterior an *osterior
$ Foot *ie&e fits into
$ O.a ino
$ Sta*eius mus&es inserte
"a&6 of ne&6 of sta*es
$ Fa&ia ner.e
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Mie Ear
C'ora Tym*ani
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7oints
$ Syno.ia 8oints$ Ca*sue &onsists mainy of
easti& tissue
$ Transmits soun a.esfrom air to s&aa .esti"ui
$ Otos&erosis
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Eusta&'ian Tu"e
$ To t'irs &artia!inous$ One t'ir "ony
$ Meia forms tu"a ee.ation
in atera a naso*'aryn#
$ O*ens into anterior a ofmie ear
$ e.ator an tensor *aati
mus&es o*en Eusta&'ian
tu"e$ E-uaise *ressure on
tym*ani& mem"rane
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%uitory Pat'ay
$ Co&'ea$ Co&'ear ner.e
$ Co&'ear nu&ei
$ Centra auitory *at'ay
$ Corte# tem*ora o"e
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Co&'ea
$ 9 : turns
$ Moious &entra *iar
$ %#is of interna a&ousti&
meatus
$ S*ira amina
$ Basiar mem"rane
$ ;esti"uar mem"rane
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$ O.a ino$ S&aa .esti"ui
$ S&aa tym*ani
$ Se&onary tym*ani&
mem"rane$ Contain *eriym*'
$ S&aa meia or u&t of
&o&'ea enoym*'
Co&'eaMOB TCD
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S&aa Meia
$ Basiar mem"rane$ S*ira or!an
$ +air &es of or!an of &orti
$ Te&toria mem"rane
$ Sin!e ro of inner 'air&es
$ Ea&' one 'as 9< ar!e
afferent
$ Outer 'air &es
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Soun 5a.es
$ %uri&e$ E#terna ear
$ Tym*ani& mem"rane
$ Maeous, in&us, sta*es
$ O.a ino$ Pressure a.es in s&aa .esti"ui,
s&aa meia, s&aa tym*ani
$ Roun ino
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Co&'ea
$ Tra.ein! a.e t'eory$ o tones *ea6 at a*e#
$ +i!' tones at "ase
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%uitory 2er.e
$ Re&e*tors are 'air &es ofor!ans of &orti
$ Bi*oar &es
$ Ce "oies are in t'e s*ira
!an!ion on t'e$ S*ira amina
$ %uitory ner.e atta&'e to
oer "orer of *ons
$ Cere"ear=*ontine an!e
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%uitory Pat'ay
$ First orer neurones enon .entra an orsa&o&'ear nu&ei
$ On inferior &ere"ear*eun&e
$ 9n(orer neurones
$ Tra*e1oi "oy
$ atera eminis&us
$ Inferior &oi&uus
$ Su*erior oi.ary nu&eus
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$ Inferior &oi&uus$ ;ia inferior "ra&'ium
$ Meia !eni&uate "oy
$ >r(orer neurones
$ %uitory raiations to auitory&orte# in tem*ora o"e
%uitory Pat'ayMOB TCD
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atera eminis&us
$ Fi"res arise from$ ;entra &o&'ear nu&eus
$ Dorsa &o&'ear nu&eus
$ Form atera emins&us
$ Su*erior oi.ary nu&eus
$ Mainy &ontra atera
$ Fi"res en in inferior &oi&ui
nu&ei "a&6 of mi"rain
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Su*erior Oi.ary 2u&eus
$ Re&ei.es in*uts from "ot'ears
$ Intensity an timin!
$ I*siatera are e#&itatory
an earier an moreintense
$ Contraatera in'i"itory .ia
nu&eus in tra*e1oi
$ Pro8e&ts to inferior &oi&ui
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Inferior Coi&ui
$ S*atia information$ Su*erior oi.ary nu&eus
$ Intensity from .entra &o&'ear
nu&eus
$ Pit&' from orsa &o&'earnu&eus
$ Pro8e&ts to meia !eni&uate
"oy
$ In'i"itory to o**osite &oi&uarnu&eus
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Meia 3eni&uate Boy
$ Meia !eni&uate "oy$ S*e&ifi& t'aami& nu&eus for
'earin!
$ aminate an tone to*i&
$ Fi"res *ro8e&t as auitoryraiations to *rimary auitory
&orte#
$ Su*erior tem*ora !yrus an
a8oinin! *art of insua
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%uitory RaiationsMOB TCD
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Primary %uitory Corte#
$ Tem*ora o"e$ +es&' !yrus
$ Posterior *ortion 'i!'
tones
$ %nterior o tones$ Biatera re*resente
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Primary %uitory Corte#MOB TCD
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%uitory Refe#es
$ %uitory to motor nu&eus of/t'an ?t'
$ Contra&tion of tensor
Tym*ani an sta*eius
$ Dam*en .i"rations$ %uitory to reti&uar nu&ei
arousa
$ Conne&t to fa&ia
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Deafness
$ Conu&tion$ E#terna
$ Mie
$ Inner ear
$ 2er.e eafness
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Position of Boy in S*a&e
$ ;isua system
$ T'e &ons&ious *ro*rio&e*ti.e
system
$ ;esti"uar system
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;esti"uar %**aratus
$ Bony a"yrint'$ Bony &o&'ea
$ ;esti"ue
$ Bony semi&ir&uar &anas
$ Contain *eriym*'$ Communi&ates it' CSF
$ Su"ara&'noi s*a&e
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$ Mem"ranous a"yrint'
$ Su*erior an *osterior&ommon o*enin! at nonam*uary en
$ atera semi&ir&uar &anas
$ Fi.e o*enin!s into utri&e$ Enoym*'ati& u&t
$ Sa&&ue
$ Du&tus reuiens
$ Du&t of &o&'ea$ Contain enoym*'
;esti"uar %**aratus
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;esti"uar Re&e*tors
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Re&e*tors
$Sensory stati& re&e*tors inma&ua of t'e utri&e an sa&&ue
$ Cristae of t'e am*uae are t'e
en or!ans of t'e ynami&
mo.ement semi&ir&uar &anas
$ Ma&uae res*on to inear
a&&eeration of 'ea in 'ori1onta
or .erti&a *ane urin! a6in!
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$ +air &es are foun in t'e
ma&ua is&'ar!e a t'e time
$ Ciia on t'e 'air &es em"ee
in !eatinous su"stan&e
&ontainin! &a&ium &ar"onate
&rystas
Re&e*tors
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;esti"uar Pat'ay
$ Ce "oies are in t'e.esti"uar !an!ion in t'e
interna a&ousti& meatus
$ Reay in .esti"uar nu&eus
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$ ;esti"uar nu&eus to&ontra atera
$ ;entra *osterior nu&eus
of t'aamus
$ Be'in fa&e area ofsomato=sensory &orte#
;esti"uar Pat'ay
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$ atera .esti"uos*ina tra&tarises from atera or Deitersnu&eus
$ Des&ens in anterior &oumnof same sie
$ Syna*se on anti=!ra.itymotor neurones
$ %&ti.e urin! a6in!
$ %nti!ra.ity in utri&e
$ Free fa sa&&ue
;esti"uar Pat'ay
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$ Meia .esti"uo=s*ina
$ Des&en "iateray
$ Meia on!ituina Fas&i&uus
(MF) to &er.i&a &or
$ +ea ri!'tin! refe#$ Eye ri!'tin! refe#
$ %rise from atera .esti"uar
nu&eus
$ E#tra o&uar nu&ei
;esti"uar Pat'ay
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$ %fferents from t'e &ristae en
in meia an su*erior
.esti"uar nu&ei
$ To ay &onne&tion it'
$Fo&&uo nouar o"e to a.esti"uar nu&ei
;esti"uar Pat'ay
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;esti"uar Pat'ay
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;esti"uar Pat'ay
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;esti"uo=O&uar Refe#es
$ Ri!'tar 'ea turn a&ti.atesin t'e ri!'t atera semi&ir&uar
&ana
$ Resutin! in &ontra&tion of eft
atera re&tus an ri!'t meia
re&tus
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$ Uner &ere"ear !uian&e
$ Ri!'t meia .esti"uar
nu&eus
$ Res*ons to ri!'tar 'ea
turn$ Im*use to o**osite *ara
meian re!ion
$ Meia re&tus
;esti"uo=O&uar Refe#es
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2ysta!mus
$ +ori1onta .esti"uo=o&uarrefe#
$ Fast an so *'ase
$ Cae after fast *'ase
$ 2ysta!mus a&&om*anie "y.erti!o
C i E Fi MOB TCD
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Corti&a Eye Fies
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