Intrinsic Laryngeal Muscles Flashcards
1
Q
Cricothyroid pars recta
A
- Attaches cricoid to inferior border of the thyroid lamina
- Brings cricoid and thyroid closer together, this lengthens the VFs and contributes to controlling pitch (esp. higher frequencies).
2
Q
Cricothyroid pars oblique
A
- Attaches cricoid to inferior cornu of the thyroid
- Brings cricoid and thyroid closer together, this lengthens the VFs and contributes to controlling pitch (esp. higher frequencies).
3
Q
Thyroarytenoid - vocalis
A
- Attaches thyroid to the medial portion of the thyroarytenoid (vocal process)
- Forms muscular base/bulk of the VF. It brings arytenoids forward, tensing the VFs. They become shorter and heavier. This decreases pitch and increases loudness. Tightens glottic closure
4
Q
Thyroarytenoid - thyromuscularis
A
- Attaches thyroid to the lateral portion of the thyroarytenoid (muscular process)
- Likely involved in engaging the FVFs.
5
Q
Transverse interarytenoid
A
- Horizontal muscle that lies between the lateral laminae of the arytenoids
- Bring the bases of the arytenoids together, shortening interarytenoid distance
6
Q
Oblique interarytenoid
A
- Paired muscles forming an x-configuration between one arytenoid base and the other arytenoid apex
- Also shortens interarytenoid distance and contributes to forceful closure of posterior glottis
7
Q
Lateral cricoarytenoid
A
- Attaches cricoid to arytenoid muscular process
- Rocks the arytenoids anteriorly and slides them laterally, thereby bringing the vocal processes medially and adducting the VFs.
8
Q
Posterior cricoarytenoid
A
- Attaches posterior aspect of the cricoid to arytenoid
- The sole VF abductor
- Rocks the arytenoids posteriorly + redirects vocal processes laterally, thereby separating the VFs.
- Important for respiration and quick unvoiced opening gestures during unvoiced sound productions
9
Q
LCA + TA
A
-Together help to increase tension in the VF closure and are important for speaking louder
