BIOL 1004 Lecture Notes - Exhalation, Fundamental Frequency, Lamina Propria

5 views2 pages
Published on 28 Jan 2013
Department
Course
Professor
Larnyx and Speech
I. Functions
a. Protection of respiratory tract (s.t. food/saliva/etc don’t get into respiratory tract)
b. Assistance controlling intra-thoacic pressure (can close off airway => increased
thoracic pressure (for straining or coughing)
c. Production of sound (via vocal folds
II. Structure
a. Cartilaginous Framework
i. Thyroid, cricoid, & arytenoid cartilage, epiglottis, & hyoid bone
ii. Arytenoid cartilage—has vocal process (where vocal fold attaches) &
muscle process
b. Membranes & Ligaments
i. membrane==general term for sheet of tissue
ii. ligament==often just thickening of membranes
iii. Thyrohyoid membrane—between hyoid bone and thyroid cartilage
iv. Quadrangular membrane—between thyroid cartilage and vocal folds
* False vocal fold—inferior edge of quadrangular membrane
v. Cricothyroid membrane = cricovocal mem = conus elasticus
c. Musculature
i. Extrinsic Muscles
1. Suprahyoids (digastric, myohyoid, stylohyoid, geniohyoid); raise
the larynx
2. Infrahyoids (sternothyroid, omohyoid, sternohyoid,
thyrohyoid); lower the larynx
3. Fxn: raise/lower larynx, stabilize hyoid (so tongue can move), used
in swallowing
ii. Intrinsic Muscles
1. Adductors
a. Transverse & oblique arytenoids—adduct arytenoids
cartilage
b. Lateral Cricoarytenoids—spin & slide arytenoids =>
adduction of vocal folds
2. Abductors
a. Posterior cricoarytenoids—move arytenoids apart =>
vocal fold abduction
3. Adjustors
a. Cricothyroid muscle—pulls/tips thyroid cartilage down
and slides it forward (inn. by external laryngeal n)
b. Thyroarytenoid & vocalis muscle—adduct folds, slacken
folds, and change their shape (bring together parts of folds)
i. Vocalis is medial-most portion of thyroarytnoid m.
ii. Fibers of both mm. run ~ same direction
d. Of note: folds become stiffer from epithelium → vocalis muscle & near
connections of vocal fold to surrounding cartilage (arytenoids & thyroid
cartilage); VOCAL FOLD IS COMPLEX, MULTILAYERED VIBRATOR
Unlock document

This preview shows half of the first page of the document.
Unlock all 2 pages and 3 million more documents.

Already have an account? Log in

Get OneClass Notes+

Unlimited access to class notes and textbook notes.

YearlyBest Value
75% OFF
$8 USD/m
Monthly
$30 USD/m
You will be charged $96 USD upfront and auto renewed at the end of each cycle. You may cancel anytime under Payment Settings. For more information, see our Terms and Privacy.
Payments are encrypted using 256-bit SSL. Powered by Stripe.