Larynx Muscles (intrinsic) Flashcards
whats the difference between extrinsic and intrinsic muscles of the larynx?
what is the function of intrinsic muscles of the larynx?
For both origin and insertion are inside larynx.
intrinsic muscles control pitch, loudness, and voice quality for the voice. also control the biological valve function. control all sounds of the human voice.
The 5 intrinsic muscles of the larynx are…
Thyro________ composed of the thyro_______ and thyro______.
Posterior __________
Lateral __________
Inter________ composed of the oblique and transverse parts
_____thyroid composed of the pars _______ and the pars ______
Thyroarytenoid composed of the thyromuscularis and thyrovocalis.
Posterior cricoarytenoid
Lateral Cricoarytenoid
Interarytenoid composed of the oblique and transverse parts
Cricothyroid muscle composed of the pars oblique and the pars recta
The 3 actions of the intrinsic muscles are
1) To adjust the __________ ________ on the TVF’s (ie, shape of the glottis)
2) Control ________ behavior which refers to how much _______ _______ (ie, _________) or if they are _________ (spread apart)
3) ____ supply
All of these functions serve to change the ________ of the voice
The 3 actions of the intrinsic muscles are
1) To adjust the longitudinal tension on the TVF’s (ie, shape of the glottis)
2) Control vibratory behavior which refers to how much medial compression (ie, adduction) or if they are abducted (spread apart)
3) air supply
All of these functions serve to change the sound of the voice
Thyroarytenoid is an _______ muscle and acts as an adductor, ______ and ______
It is the muscle of the TVF’s that arises from ______ of ______ cartilage on the ________ aspect. It courses posteriorly to insert on the ________ cartilage. Contraction moves the whole thing. It has 2 parts…
1) thyro_______ goes from thyroid cartilage to muscular process of arytenoid
2) thyro_______ goes from thryoid cartilage to the vocal process of the arytenoid
Thyroarytenoid is an intrinsic muscle and acts as an adductor, tensor and relaxer
Thyroarytenoid is the muscle of the TVF’s that arises from angle of thyroid cartilage on the posterior aspect. It courses posteriorly to insert on the arytenoid cartilage. Contraction moves the whole thing. It has 2 parts…
1) thyromuscularis goes from thyroid cartilage to muscular process of arytenoid
2) thyrovocalis goes from thryoid cartilage to the vocal process of the arytenoid
The posterior cricoarytenoid (intrinsic) acts as the only muscle of VF _______. This makes it the only laryngeal muscle for _______.
Its origin is on the lamina of ________ cartilage. It courses laterally and superiorly and inserts on the muscular process of _______ cartilage. Contraction pulls the muscular processes ________
The posterior cricoarytenoid (intrinsic) acts as the only muscle of VF abduction. This makes it the only laryngeal muscle for breathing.
Posterior cricoarytenoid origin is on the lamina of cricoid cartilage. It courses laterally and superiorly and inserts on the muscular process of arytenoid cartilage. Contraction pulls the muscular processes backwards
The lateral cricoarytenoid (intrinsic) acts as an _______ and _______
It arises from the _______ surface on the lateral sides of _______ cartilage, courses posteriorly and inserts on the front of the ________ process.
Contraction pulls the muscular processes ________ and this _______ the vocal folds
The lateral cricoarytenoid (intrinsic) acts as an adductor and relaxer
It arises from the superior surface on the lateral sides of cricoid cartilage, courses posteriorly and inserts on the front of the muscular process.
Contraction pulls the muscular processes frontwards and this adducts the vocal folds
The interarytenoid (intrinsic) acts as an _______
It is between the 2 _______ cartilages. The muscle fibers arise fro one _______ and cross to the other. It has 2 parts…
________ inter_______ goes across the muscular processes
_______ inter_________ (angles across) starts from muscular process of one arytenoid and goes upwards and laterally to corniculate of arytenoid on other side. inserts on epiglottis.
is the muscle of the ________ fold
Contraction pulls the epiglottic cartilage ________
The interarytenoid (intrinsic) acts as an adductor
It is between the 2 arytenoid cartilages. The muscle fibers arise fro one arytenoid and cross to the other. It has 2 parts…
transverse interarytenoid goes across the muscular processes
oblique interarytenoid (angles across) starts from muscular process of one arytenoid and goes upwards and laterally to corniculate of arytenoid on other side. inserts on epiglottis.
is the muscle of the aryepiglottic fold
Contraction pulls the epiglottic cartilage backwards
Describe how and why the larynx is _______ protected during swallowing.
1) _______ folds posteriorly over the opening of larynx
2) ________ folds contract and close
3) _____ contract and close
4) _____ contract and close for protection of the airway from ________ of food and drink!
Describe how and why the larynx is quadruple protected during swallowing.
1) epiglottis folds posteriorly over the opening of larynx
2) aryepiglottic folds contract and close
3) FVF’s contract and close
4) TVF’s contract and close for protection of the airway from aspiration of food and drink!
The cricothyroid (intrinsic) acts as a ______
It has 2 parts…
pars _____
pars ______
It is the muscle of _____ change. Works by decreasing the gap between cricoid and thyroid cartilages which _______ the TVF’s and _______ pitch, or shortening them which ________ pitch
The cricothyroid (intrinsic) acts as a tensor
It has 2 parts…
pars recta
pars oblique
It is the muscle of pitch change. Works by decreasing the gap between cricoid and thyroid cartilages which lengthens the TVF’s and increases pitch, or shortening them which decreases pitch
The muscles of VF adduction are the _________, ________ _________, _________
The muscles of VF tension are the __________ and _________
The muscles of VF relaxation are the lateral __________, and ___________
The only** muscle of vocal **abduction is the posterior ___________
The muscles of VF adduction are the thyroarytenoid, lateral cricoarytenoid, interarytenoid
The muscles of VF tension are the thyroarytenoid and cricothryoid
The muscles of VF relaxation are the lateral cricoarytenoid, and thyroarytenoid
The only** muscle of vocal **abduction is the posterior cricoarytenoid
