Larynx Flashcards
Name the three functions of the larynx and indicate the most important
- part of the air passages
- car as a sphincter
- SOUND PRODUCTION
Sound production from the larynx
Act as the organ of phonation
-controls the expulsion of air from the lungs to produce sounds
Where is the larynx located?
C4-c6
What makes up the layngeal skeleton?
CARTILAGE
-3 unpaired cartilages and 3 paired
Name the unpaired cartilages
- thyroid
- cricoid
- epiglottis
Name the paired cartilages
- arytenoid
- corniculate
- cuneiform
What is the most inferior and most superior paired cartilages
Inferior-arytenoid
-superior-cuneiform
The two plate laminae fuse anteriorly to form what
Laryngeal prominence (Adams apple)
What notch is located above the laryngeal prominence
Superior laryngeal notch
What do the inferior horns of thyroid cartilages articulate with?
Cricoid cartilage
What is the oblique line and what does it attach?
- a ridge on the lateral aspect of the thyroid cartilage
- gives attachment to sternothyroid, thyrohyoid, and inferior pharyngeal constrictor muscle
Where is cricoid cartilage located?
Inferior to the thyroid
What is the cricoid cartilage shaped like?
- signet ring
- narrow arch anterior and wide lamina posterior
What does the small articulate facet at the junction of the arch and the lamina of the cricoid articulate with?
The inferior horn of the thyroid cartilage
The superior border of the lamina has two facets for articulation of what? (Lamina of the cricoid)
The bases of the arytenoid cartilages
What marks the boundary between larynx and trachea?
Inferior border of the cricoid cartilage
What ligament connects the inferior border of cricoid and first tracheal cartilage?
Cricotracheal ligament
What kind of cartilage makes up epiglottis cartilage?
Elastic cartilage
What connects the inferior end of epiglottis cartilage to the angle formed by laminae of thyroid cartilage
Thyroepiglottic ligament
The anterior surface of epiglottis is attached to body of hyoid by…
Hyoepiglottic ligament
What is the shape of arytenoid cartilage
-pyramidal cartilage on each side of the superior border of cricoid lamina
Vocal process of arytenoid cartilage gives attachment yo what’s?
Vocal ligament
Muscular process of arytenoid cartilage gives attachment to…
Posterior and lateral cricoarytenoid muscles
What kind of joint is the cricothyroid?
Synovial joint
Where is the cricothyroid joint?
Between articulate facet on the lateral aspect of cricoid cartilage and inferior horn road cartilage
What kind of movement does cricothyroid joint allow?
Allow thyroid cartilage to tilt forward and backward on cricoid cartilage
What is the action of cricothyroid muscles?
Lengthening and increasing tension of vocal ligaments
