Vocal cord Paralysis - PowerPoint Presentation

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Vocal cord Paralysis - PPT Presentation

Moderator DRAVS HANUMANTHA RAO Professor entheadampneck surgery Done by DR POLUNAIDU pg in ent 1102012 wwwnayyarENTcom 1 Introduction 1102012 wwwnayyarENTcom ID: 360114

nayyarent www paralysis 2012 www nayyarent 2012 paralysis unilateral vocal management cord evaluation laryngeal larynx nerve membrane bilateral amp

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Slide1

Vocal cord Paralysis

Moderator: DR.AVS HANUMANTHA RAO Professor, ent,head&neck surgery Done by: DR. POLUNAIDU pg in ent

1/10/2012

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1Slide2

Introduction:

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2Slide3

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3Slide4

The Vagus

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4Slide5

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5Slide6

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6Slide7

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7Slide8

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8Slide9

Anatomy of larynx

Larynx is a midline structure, extending from root of tongue to trachea, it lies in front of c3 to c6.

in children & females it lies at higher level.

PARTS OF LARYNX-

larynx consists of skeletal framework of cartilages connected by joints , ligaments& membranes ,

cartilages are moved by no. of muscles .

The cavity is lined by mucus membrane

Cartilages

1, unpaired- epiglottis

thyroid

cricoid

2, paired- arytenoid

cuneiform(c. of

wrisberg

)

corniculate

(c. of

santorini

)

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9Slide10

Ligaments& membranes

Thyrohyoid

membrane(extrinsic)

Thyrohyoid

ligament

Cricothyroid

membrane(extrinsic)

Cricovocal

membrane(internal)

Cricotracheal

membrane(extrinsic)

Quadrangular membrane(internal)

Anterior commissure tendon(

broyle’s

ligament)

Hyoepiglottic

ligament

Cricothyroid

ligament

Joints:

Cricothyroid

cricoarytenoid

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10Slide11

The Laryngeal Musculature

All The intrinsic muscles of the larynx are paired except transverse interarytenoid

. , all of which are innervated by the recurrent laryngeal nerve, except crico

thyroid,Muscles which change

size and shape

of inlet of larynx:

aryepiglottic

& oblique arytenoid

Muscles which

move

vocal cord:

abductors:

posterior

cricoarytenoid

- only abductor

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11Slide12

Adductors:

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12Slide13

Thyroarytenoid

- - very broad muscle, usually divided into three parts: Thyroarytenoideus internus (vocalis

) - adductor and major tensor of free edge of vocal fold.Thyroarytenoideus

externus

- major adductor of vocal fold

Thyroepiglotticus

- shortens vocal ligaments

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13Slide14

Anatomy of the Larynx - Motion

Adductors of the Vocal Folds:

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14Slide15

Position of vocal cords

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15Slide16