1
Phonation Lab 2
Use of Laryngeal Models for Review of Structures (Model Lab)
To the Instructor:
The following model lab is the best way I know of to provide an overview of the relationships of
muscles and the cartilage. A cadaver lab using actual specimens provides a great orientation, but
laryngeal size is so limiting that models are needed to provide the appropriate detail. Again, a
very useful way of approaching the material is to discuss the information and follow the
discussion with a round-robin point-and-questioning of students. They appreciate having an
opportunity to review what they know, and your verbal quizzing goes a long way toward their
active participation! You may wish to add some of the following images from the Image Library
to the lab guide so that students will have them at hand as a reference in the lab.
Figure
3-4
Relationship of laryngeal structures
3-5
Cavities of the larynx
3-8
Cricoid cartilage
3-9
Thyroid cartilage
3-10
Cricoid with arytenoids
3-15
Intrinsic muscles of the larynx: Lateral cricoarytenoid, posterior
cricoarytenoid, oblique and transverse arytenoids, cut cricothyroid,
aryepiglotticus, thyroepiglotticus, superior thyroarytenoid
3-17
Cricothyroid pars recta and pars oblique
3-18
Thyrovocalis and thyromuscularis
2
Phonation Lab 2
Use of Laryngeal Models for Review of Structures (Model Lab)
Study the muscles and cartilages in preparation for discussion during lab. Lab will focus on the
origins, insertions, courses, and innervations of the laryngeal structures, as well as the
cartilaginous framework. You may want to review the lessons in ANATESSE related to the
laryngeal mechanism prior to this lab to refresh your memory of the structures and functions.
Cartilages:
thyroid
cricoid
arytenoid
epiglottis
triticial
cuneiform
corniculate
Joints:
cricothyroid
thyroarytenoid
Intrinsic muscles of the larynx:
thyromuscularis: relaxer
thyrovocalis: tenser, vibrating portion
posterior cricoarytenoid: abductor
lateral cricoarytenoid: adductor
transverse interarytenoid: adductor
oblique interarytenoid: adductor
cricothyroid: pitch change