Anatomy of Phonation Chapter 4

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Anatomy of Phonation Chapter 4 Perry C. Hanavan

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Anatomy of Phonation Chapter 4. Perry C. Hanavan. Stars. Functions of Larynx. Phonation Sphincter Swallowing Aspiration (during swallow) Holding breath. Phonation. Phonation or voicing Vibrating the vocal folds in the larynx Video Stroboscopy of the Vocal Cords Subglottis. Phonation. - PowerPoint PPT Presentation

Transcript of Anatomy of Phonation Chapter 4

Page 1: Anatomy of Phonation Chapter 4

Anatomy of PhonationChapter 4

Perry C. Hanavan

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Functions of Larynx

• Phonation

• Sphincter– Swallowing

• Aspiration (during swallow)

– Holding breath

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Phonation

• Phonation or voicing– Vibrating the

vocal folds in the larynx

– Video Stroboscopy of the Vocal Cords

• Subglottis

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Phonation

• Voiced• Unvoiced

• Subglottal

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Bernoulli

• Bernoulli effect– Inverse relationship– Increase in air flow results

in air pressure decrease– YouTube– YouTube

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Summary of Phonation

• Phonation is the act of voicing• Vocal fold vibrates• Bernoulli effect• Interaction between subglottal

pressure, elasticity of vocal folds, and Bernoulli

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Larynx

• Musculo-cartilaginous structure located at upper end of trachea

• Valve

• Size varies with age and gender

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Question

Which of the following cartilages of the larynx consist of pairs (2)?

A.Cricoid

B.Thyroid

C.Arytenoid

D.Corniculate

E.Epiglottis

F.Hyoid

SMART Response QuestionTo set the properties right click and selectSMART Response Question Object->Properties...

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Question

Which of the following is an osseous structure?

A.Cricoid

B.Thyroid

C.Arytenoid

D.Corniculate

E.Epiglottis

F.Hyoid

SMART Response QuestionTo set the properties right click and selectSMART Response Question Object->Properties...

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Tour of Larynx

• Cartilaginous structures– Cricoid– Thyroid– Arytenoid– Corniculate– Epiglottis

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Cricoid Cartilage

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Aryteniod Cartilages

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Crico-Arytenoid Articulation

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Thyroid Cartilage

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Thyroid/Cricoid Articulation

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Tour of Larynx

• Cartilaginous structures– Cricoid– Thyroid– Arytenoid– Corniculate– Epiglottis

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Tour of Larynx

• Cartilaginous structures– Cricoid– Thyroid– Arytenoid– Corniculate– Epiglottis

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Valleculae

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Valleculae

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Osseous Structure

• Hyoid

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Question

How many pairs of vocal folds do we have?

A.One

B.Two

C.Three

D.Four

E.Five SMART Response QuestionTo set the properties right click and selectSMART Response Question Object->Properties...

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Inside the Larynx

• True vocal folds

• False vocal folds

• Laryngeal ventricle

Zemlin: Tour of the Larynx

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Questions

Draw or bring together?

A.Duct

B.Abduct

C.Adduct

D.Induct

E.Subduct SMART Response QuestionTo set the properties right click and selectSMART Response Question Object->Properties...

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Vocal Folds

Vocal folds in action

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Vocal Folds

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Question

Muscles that connect to the same structure are referred to as ________ muscles.

A.Trinsic

B.Intrinsic

C.Extrinsic

D.Cotrinsic

E.SubtrinsicSMART Response QuestionTo set the properties right click and selectSMART Response Question Object->Properties...

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Intrinsic Laryngeal Muscles

Adducts vocal folds; X cranial nerve

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Question

There is only one intrinsic tensor muscle of the larynx?

True

False

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Intrinsic Laryngeal Muscles

Add

Add

Aux

Tense

Aux

Tense

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Intrinsic Laryngeal Muscle

• Only abductor

• X cranial nerve

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Intrinsic Laryngeal Muscles

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Question

The text book suggests there are 2 muscles of the vocal fold?

True

False

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Intrinsic Laryngeal Muscles

• Thyrovocalis (vocalis) muscle tensor

• Thyromuscularis muscle is relaxor

• (debatable)

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Intrinsic Laryngeal Muscles

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External Laryngeal Muscles

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External Laryngeal Muscles

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Vocal Cord Paralysis

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Extrinsic Muscles

• Larynx Anatomy Made Easy

• Extrinsic & Intrinsic Muscles

• Discover the Larynx

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Joints

• Discover the Larynx

• Zemlin Slides

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Nerves

• Discover the Larynx

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Common Disorders

• University of Pittsburgh

• Vocal Surgery

• Pre-vocal surgery

• Cancer

• ENT Surgery