Muscles of the larynx Flashcards
Aryepiglotticus
Attachments: from the oblique arytenoids to the aryepiglottic folds
Function: closes the aryepiglottic folds
Innervation: recurrent laryngeal n.
Blood supply: superior & inferior laryngeal a.
Lateral cricoarytenoid (G. krikos, a ring)
Attachments: from the arch of the cricoid cartilage to the muscular process of the arytenoid
Function: closes the glottis (adducts the vocal folds)
Innervation: recurrent laryngeal n.
Blood supply: superior & inferior laryngeal a.
Posterior cricoarytenoid
Attachments: from the posterior surface of the cricoid lamina to the muscular process of the arytenoid cartilage
Function: opens the glottis (abducts the vocal folds)
Innervation: recurrent laryngeal n.
Blood supply: superior & inferior laryngeal a.
Cricothyroid
Attachments: fro the anterolateral external aspect of the cricoid cartilage to the lower border of the thyroid cartilage & inferior cornu
Function: tenses the vocal folds
Innervation: external laryngeal n.
Blood supply: superior thyroid a.
Interarytenoids (transverse & oblique)
Attachments: from arytenoid to arytenoid
Function: closes glottis & assists in closing aryepiglottic folds
Innervation: recurrent laryngeal n.
Blood supply: superior & inferior laryngeal a.
Thyroarytenoid
Attachments: from the lower half of the thyroid angle to the anterolateral aspect of the arytenoid cartilage
Function: closes glottis or slackens vocal folds
Innervation: recurrent laryngeal n.
Blood supply: superior & inferior laryngeal a.
Thyroepiglotticus
Attachments: from the thyroid angle to the epiglottic margin
Function: widens glottis
Innervation: recurrent laryngeal n.
Blood supply: superior & inferior laryngeal a.
Vocalis
Attachments: from the thyroid angle to the vocal process of the arytenoid cartilage
Function: slackens tensed vocal ligaments for changes in pitch
Innervation: recurrent pharyngeal n.
Blood supply: superior & inferior laryngeal a.
