Post on 28-Dec-2015
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
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...
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...
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...
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...
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)
Is it GERD or Is it?
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