Intrinsic Laryngeal Muscles Flashcards
Origin of Aryepiglottic
Apex of the arytenoid cartilage
Insertion of Aryepiglottic
Epiglottis
Action of Aryepiglottic
Draws the epiglottis posteriorly and downward during swallowing
Origin of Oblique Arytenoid
Muscular process of the arytenoid cartilage
Insertion of the Oblique Arytenoid
Posterior surface of the contralateral arytenoid cartilage, near its apex
Action of Oblique Arytenoid
Draws the arytenoid cartilage together, adducting the vocal folds
Origin of Transverse Arytenoid
Posterior surface of the arytenoid cartilage
Insertion of Transverse Arytenoid
Posterior surface of the contralateral arytenoid cartilage
Action of Transverse Arytenoid
Draws the arytenoid cartilage together, adducting the vocal cords
Origin of Lateral Cricoarytenoid
Arch of the cricoid cartilage
Insertion of Lateral Cricoarytenoid
Muscular process of the arytenoid cartilage
Action of Lateral Cricoarytenoid
Draws the muscular process of the arytenoid cartilage anteriorly ; which pivots the arytenoid cartilage and adducts the vocal cords
Origin of Posterior Cricoarytenoid
Posterior surface of the lamina and the cricoid cartilage
Insertion of Posterior Cricoarytenoid
Muscular process of the arytenoid cartilage
Action of the Posterior Cricoarytenoid
Draws the muscular process of the arytenoid cartilage posteriorly ; which pivots the arytenoid cartilage and abducts the vocal cords
Origin of Cricothyroid
Arch of the cricoid cartilage
Insertion of Cricothyroid
Inferior border of the thyroid cartilage
Action of Cricothyroid
Draws the thyroid cartilage forward, lengthening the vocal ligaments
Origin of Thyroarytenoid
Inner surface of the thyroid cartilage anteriorly
Insertion of Thyroarytenoid
Lateral border of the arytenoid cartilage
Action of Thyroarytenoid
Draws the arytenoid cartilage forward, relaxing and adducting the vocal folds
Origin of Thyroepiglottic
Inner surface of the thyroid cartilage near the laryngeal prominence
Insertion of Thyroepiglottic
Lateral surface of the epiglottic cartilage
Action of Thyroepiglottic
Draws the epiglottic cartilage downward
Origin of Trachealis
Posterior edge of the tracheal cartialage
Insertion of Trachealis
Posterior edge of the tracheal cartilage of other side (joins tracheal rings posteiorly)
Action of the Trachealis
Constricts the bronchi and trachea
Origin of Vocalis
Surface of the thyroid cartilage, vocal process of the arytenoid cartilage
Insertion of Vocalis
Vocal ligament
Action of Vocalis
Relaxes segments of the vocal ligament thereby adjusting pitch
