Anatomy of Phonation Chapter 4 Perry C Hanavan

Functions of Larynx • Phonation • Sphincter – Swallowing • Aspiration (during swallow) –

Phonation • Phonation or voicing – Vibrating the vocal folds in the larynx –

Phonation • Voiced • Unvoiced • Subglottal

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

Summary of Phonation • • Phonation is the act of voicing Vocal fold vibrates

Larynx • Musculocartilaginous structure located at upper end of trachea • Valve • Size

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

Question Which of the following is an osseous structure? A. Cricoid B. Thyroid C.

Tour of Larynx • Cartilaginous structures – – – Cricoid Thyroid Arytenoid Corniculate Epiglottis

Question How many pairs of vocal folds do we have? A. One B. Two

Inside the Larynx • True vocal folds • False vocal folds • Laryngeal ventricle

Questions Draw or bring together? A. Duct B. Abduct C. Adduct D. Induct E.

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

Intrinsic Laryngeal Muscles Adducts vocal folds; X cranial nerve

Question There is only one intrinsic tensor muscle of the larynx? True False

Intrinsic Laryngeal Muscles Aux Add Aux Tense

Intrinsic Laryngeal Muscle • Only abductor • X cranial nerve

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

Intrinsic Laryngeal Muscles • Thyrovocalis (vocalis) muscle tensor • Thyromuscularis muscle is relaxor •

Intrinsic Muscles • • • Instant Anatomy UAMS Anatomy Intrinsic Muscles Disorders of Voice

Extrinsic Muscles • Larynx Anatomy Made Easy • Extrinsic & Intrinsic Muscles • Discover

Joints • Discover the Larynx • Zemlin Slides

Common Disorders • • • University of Pittsburgh Vocal Surgery Pre-vocal surgery Cancer ENT

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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 • Voiced • Unvoiced • Subglottal

Bernoulli • Bernoulli effect – Inverse relationship – Increase in air flow results in air pressure decrease – You. Tube

Summary of Phonation • • Phonation is the act of voicing Vocal fold vibrates Bernoulli effect Interaction between subglottal pressure, elasticity of vocal folds, and Bernoulli

Larynx • Musculocartilaginous structure located at upper end of trachea • Valve • Size varies with age and gender

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

Question Which of the following is an osseous structure? A. Cricoid B. Thyroid C. Arytenoid D. Corniculate E. Epiglottis F. Hyoid

Tour of Larynx • Cartilaginous structures – – – Cricoid Thyroid Arytenoid Corniculate Epiglottis

Cricoid Cartilage

Aryteniod Cartilages

Crico-Arytenoid Articulation

Thyroid Cartilage

Thyroid/Cricoid Articulation

Tour of Larynx • Cartilaginous structures – – – Cricoid Thyroid Arytenoid Corniculate Epiglottis

Valleculae

Osseous Structure • Hyoid

Question How many pairs of vocal folds do we have? A. One B. Two C. Three D. Four E. Five

Inside the Larynx • True vocal folds • False vocal folds • Laryngeal ventricle Zemlin: Tour of the Larynx

Questions Draw or bring together? A. Duct B. Abduct C. Adduct D. Induct E. Subduct

Vocal Folds Vocal folds in action

Vocal Folds

Question Muscles that connect to the same structure are referred to as ____ muscles. A. Trinsic B. Intrinsic C. Extrinsic D. Cotrinsic E. Subtrinsic

Intrinsic Laryngeal Muscles Adducts vocal folds; X cranial nerve

Question There is only one intrinsic tensor muscle of the larynx? True False

Intrinsic Laryngeal Muscles Aux Add Aux Tense

Intrinsic Laryngeal Muscle • Only abductor • X cranial nerve

Intrinsic Laryngeal Muscles

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

Intrinsic Laryngeal Muscles • Thyrovocalis (vocalis) muscle tensor • Thyromuscularis muscle is relaxor • (debatable)

Intrinsic Laryngeal Muscles

Is it GERD or Is it?

External Laryngeal Muscles

Vocal Cord Paralysis

Intrinsic Muscles • • • Instant Anatomy UAMS Anatomy Intrinsic Muscles Disorders of Voice

Extrinsic Muscles • Larynx Anatomy Made Easy • Extrinsic & Intrinsic Muscles • Discover the Larynx

Joints • Discover the Larynx • Zemlin Slides

Nerves • Discover the Larynx

Common Disorders • • • University of Pittsburgh Vocal Surgery Pre-vocal surgery Cancer ENT Surgery