muscles of larynx Flashcards
Cricothyroid muscle action, does it lengthen or shorten the vocal ligaments?
TILTS thyroid cartilage forward and down on the cricoid, this LENGTHENS the vocal ligaments
Cricothyroid innervation?
External Branch of Superior Laryngeal nerve
Cricothyroid attachments?
Cricoid Arch
thyroid cartilage
Posterior Cricoarytenoid Muscle attachmetns?
Cricoid Lamina
Muscular process of arytenoid cartilage
Posterior Cricoarytenoid Muscle action?
ABducts the vocal folds/ open rima glottidis. Pulls arytenoids backwards, and assists cricothyroid to tense the vocal cords
What is the ONLY muscle that opens the rima glottidis
the Posterior Cricoarytenoid Muscle
Posterior Cricoarytenoid Muscle Innervation?
Recurrent laryngeal nerve
Transverse and Oblique Arytenoid Muscles Attachments
From one arytenoid cartilage to the other arytenoid cartilage
Aryepiglottic Muscle attachment
formed by oblique arytenoid fibers that continue into the aryepiglottic fold
Action of the Tranverse and Oblique Arytenoid Muscles and Aryepiglottic Muscles?
ADDucts the arytenoid cartilages closing posterior rima glottidis
Transverse and Oblique Arytenoid muscles and Aryepiglottic Muscle innervation?
Recurrent laryngeal nerve
Vocalis Muscles attachments
Arytenoid cartilage (vocal process) Angle of the thyroid cartilage and along the vocal ligament
Vocalis muscle Action
Produces minute adjustments of the vocal ligaments, contraction produces localized relaxation of the vocal ligament
Vocalis Muscle Innervation
Recurrent Laryngeal nerve
Thyroarytenoid Muscles attachments
Arytenoid cartilage
Angle of thyroid cartilage and along cricothyroid ligament
Thyroarytenoid Muscle action
draw arytenoid cartilages towards the thyroid cartilage, thereby relaxing vocal ligaments
Thyroarytenoid Muscles innervation
recurrent laryngeal nerve
During deglutition the larynx _____ and ______
elevates and moves anteriorly
When u swallow the epiglottis bends _____
bends posteriorly
What supplies all laryngeal sensation above the level of the vocal fold?
internal branch of superior laryngeal nerve
What supplies all sensation for the larynx BELOW the vocal fold?
recurrent laryngeal nerve
What gives motor innervation to all intrinsic muscles of the larynx? What is the exception?
All are innervated by the recurrent laryngeal nerve, except for the cricothyroid muscle which is innervated by EXTERNAL branch of superior laryngeal nerve
The inferior laryngeal nerve is the name of the _____ as it passes to the larynx?
recurrent laryngeal nerve
the Quadrangular membrane is between the
Epiglottis to arytenoid cartilage
What is the aryepiglottic ligament?
its the free SUPERIOR margin of the quadrangular membrane
What is the vestibular ligament?
the free INFERIOR margin of the quadrangular membrane
Where does the Cricothyroid ligament extend from?
From the Cricoid cartilage to the thyroid cartilage and arytenoid cartilage
What is the Vocal ligament?
the free SUPERIOR margin of the cricothyroid ligament
What is the aryepiglottic fold?
its the aryepiglottic ligament when it is covered by mucosa, it contains the corniculate and cuneiform cartilages
What is the Vestibular fold?
its the vestibular ligament when covered by a mucous membrane, they are also called the FALSE vocal cords
What is the Rima vestibuli?
the opening between the vestibular folds
What are the Vocal folds?
the Vocal ligaments when they are covered by a mucous membrane, these are the TRUE vocal folds
What is the Rima glottidis?
the opening between the vocal folds
The laryngeal cavity extends from the laryngeal inlet and extends to the
trachea
