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Phonation Lab 3
Extrinsic Laryngeal Musculature (Cadaver or Noncadaver Lab)
To the Instructor:
You can approach this as either a cadaver or a noncadaver lab. With a cadaver lab, you will often
be limited to the specimens on hand. (I use the cadaver lab that is part of our pre-med program in
biology, and cadavers are always in varying stages of dissection.) In a noncadaver format, you
can bring in your anatomy texts or use the figures listed below from the Image Library to go over
the anatomical relationships. Consider also having students examine the photographs that are
listed, as well as the line drawings, so that the relationships can be seen more clearly. (During a
recent lab study, one of my students looked at the sternohyoid and said, “That looks just like the
picture in the book!” Life imitates art!)
Figure
3-20
Digastricus anterior and posterior, stylohyoid, mylohyoid
3-21
Digastricus anterior and posterior, stylohyoid, mylohyoid, geniohyoid
3-22
Sternocleidomastoid, omohyoid, sternohyoid
3-23
Sternothyroid and thyrohyoid
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Phonation Lab 3
Extrinsic Laryngeal Musculature (Cadaver or Noncadaver Lab)
We will examine the muscular support for the larynx in this lab. You will want to review the
infra- and suprahyoid musculature in preparation for the lab.
Extrinsic muscles of the larynx:
sternothyroid
thyrohyoid
Suprahyoid muscles (hyoid elevators):
digastricus
anterior belly
posterior belly
stylohyoid
styloid process of temporal bone
mylohyoid
geniohyoid
Infrahyoid muscles (hyoid depressors):
sternohyoid
omohyoid
inferior belly
superior belly