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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
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Anatomy of PhonationChapter 4
Perry C. Hanavan
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– YouTube– YouTube
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
• Musculo-cartilaginous 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
SMART Response QuestionTo set the properties right click and selectSMART Response Question Object->Properties...
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...
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
Tour of Larynx
• Cartilaginous structures– Cricoid– Thyroid– Arytenoid– Corniculate– Epiglottis
Valleculae
Valleculae
Osseous Structure
• Hyoid
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...
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 SMART Response QuestionTo set the properties right click and selectSMART Response Question Object->Properties...
Vocal Folds
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...
Intrinsic Laryngeal Muscles
Adducts vocal folds; X cranial nerve
Question
There is only one intrinsic tensor muscle of the larynx?
True
False
SMART Response QuestionTo set the properties right click and selectSMART Response Question Object->Properties...
Intrinsic Laryngeal Muscles
Add
Add
Aux
Tense
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
SMART Response QuestionTo set the properties right click and selectSMART Response Question Object->Properties...
Intrinsic Laryngeal Muscles
• Thyrovocalis (vocalis) muscle tensor
• Thyromuscularis muscle is relaxor
• (debatable)
Intrinsic Laryngeal Muscles
Is it GERD or Is it?
External Laryngeal Muscles
External Laryngeal Muscles
Vocal Cord Paralysis
Intrinsic Muscles
• Instant Anatomy
• UAMS Anatomy
• Intrinsic Muscles
• 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