05.12 anatomy of the larynx & physiology of phonation

7/24/2019 05.12 Anatomy of the Larynx & Physiology of Phonation

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Anatomy of the Larynx &

Physiology of Phonation

Samantha Soriano-Castaeda,

MD


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Objeti!es

Anatomy of the larynx Cartilage

Ligaments

M"sles

#er!es $lood s"%%ly

Lym%hati drainage

"ntion of the larynx Clinial orrelates


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'hyroid artilage

Laminae f"seanteriorly

Laryngeal

%rominene S"%erior & inferior

thyroid noth

S"%erior horn (nferior horn


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Crioid artilage

Only om%lete ring

'hi)er %osteriorlythan anteriorly


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Arytenoid artilage

Paired %yramidalartilage A%ex

*oal %roess

M"s"lar %roess


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+%iglottis

+lasti artilage

Posterior to thetong"e, hyoid

yoe%iglottiligament

'hyro-e%iglotti

ligament Arye%iglotti fold


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Ligaments

'hyrohyoidligament

Criothyroid

ligament Criotraheal

ligament


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(nner!ation

All laryngeal m"sles are inner!atedby the recurrent laryngeal nerveinferior. exe%t the cricothyroid

muscle /hih is inner!ated by theexternal branch of the superiorlaryngeal nerve

Sensory inner!ation0 s"%raglotti 1internal branh of the s"%eriorlaryngeal ner!e

2lottis do/n/ards 1 re"rrent laryngeal


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Arteries & *eins

S"%erior thyroid 1s"%erior laryngeal 1thyrohyoid membrane

(nferior thyroid 1 inferior laryngeal 1riothyroid membran


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Lym%hatis

S"%raglotti 1 le!el ((

S"bglotti 1 le!el *( then le!el (*

2lotti area 1 no lym%hati drainage


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Laryngeal aner


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Larynx f"ntion

Protetion 1 most im%ortant

Phonation


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Phonation

so"nd %rod"tion arises frommo!ement of the tr"e !oal ords Pith

3"ality

*ol"me


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*oal folds

S"%erior & inferior 1 %se"dostrati4eds5"amo"s e%itheli"m

Medial !oal fold 1 non-)eratini6ing

strati4ed s5"amo"s e%itheli"m

7 layers S"%er4ial layer 1 8ein)e9s s%ae 1 fe/

elasti 4bers (ntermediate 1 more elasti 4bers

Dee% 1 fe/ elasti, ollagen 4bers


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$ody Co!er 'heory

Co!er 1 e%itheli"m & 8ein)e9s s%ae

$ody 1 intermediate & dee% layer

Changes in sti:ness or tension in thefold alters the m"osal /a!e


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Myoelasti Aerodynami'heory

Contration of abdominal m"sles

Closed *Cs

8ise in s"bglotti %ress"re

*Cs o%en

De in s"bglotti %ress"re, s")s inthe !oal ords $erno"lli9s e:et.

Clos"re of the *Cs

ori6ontal & !ertial mo!ement of the*Cs 1 m"osal /a!e


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; *oie< =>

?? ;"l@ =B.0 7-B>


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hih of the follo/ing m"slesAbd"t the !oal ordsE

A. Posterior rioarytenoid

$. Lateral rioarytenoid

C. CriothyroidD.(nterarytenoid


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'he inferior bo"ndary of thes"bglottis is the0

A. *estib"lar fold

$. *entrile

C. (nferior border of the thyroidartilage

D.(nferior border of the rioidartilage


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'he !estib"le is the s%ae0

A. $et/een the !oal ords

$. $et/een the tr"e & false !oal ords

C. +xtending "% from the !entrileD.$et/een the e%iglottis &arye%iglotti fold


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'he inferior bo"ndary of the on"selasti"s is the0

A. *estib"lar fold

$. *oal fold

C. Crioid artilageD.'hyroid artilage


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05.12 anatomy of the larynx & physiology of phonation

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