Intrinsic Muscles of the Larynx Flashcards
Cricothyroid m. origin
Arch of the cricoid cartilage
Cricothyroid m. insertion
Interior border and medial surface of thyroid cartilage
Cricothyroid m. action
lengthens, tenses, and adducts the vocal cords
Cricothyroid m. innervation
External branch of superior laryngeal n.
Posterior cricoarytenoid m. origin
Posterior surface of lamina of the cricoid cartilage
Posterior cricoarytenoid m. insertion
Muscular process of the arytenoid cartilage
Posterior cricoarytenoid m. action
Abduct the vocal cords
Posterior cricoarytenoid m. innervation
Recurrant laryngeal n.
Lateral cricoarytenoid m. origin
Upper border of arch of the cricoid cartilage
Lateral cricoarytenoid m. insertion
Anterior surface of muscular process of arytenoid cartilage
Lateral cricoarytenoid m. action
Adducts the vocal cords
Lateral cricoarytenoid m. innervation
Recurrent laryngeal n.
Transverse arytenoid m. origin
Posterior surface on one arytenoid cartilage
Transverse arytenoid m. insertion
Posterior surface on other arytenoid cartilage
Transverse arytenoid m. action
Adducts the vocal cords
Transverse arytenoid m. innervation
Recurrent laryngeal n.
Oblique arytenoid m. origin
Posterior surface of muscular process of arytenoid cartilage
Oblique arytenoid m. insertion
Apex of other arytenoid cartilage
Oblique arytenoid m. action
Sphincter of vestibule of the larynx
Oblique arytenoid m. innervation
Recurrent laryngeal n.
Aryepiglottic m. origin
Arytenoid cartilages
Aryepiglottic m. insertion
Thyroepiglottic ligament
Aryepiglottic m. action
Sphincters of the vestibule of the larynx
Aryepiglottic mm. innervation
Recurrent laryngeal n.
Thyroarytenoideus mm. origin
Inner surface of the thyroid cartilage where two laminae come together
Thyroarytenoideus mm. insertion
Lateral surfaces of the arytenoid cartilages
Thyroarytenoideus mm. action
Lessen the tension in the vocal ligament; sphincters of the glottis
Thyroarytenoideus mm. innervation
Recurrent laryngeal n.
Vocalis m. origin
Inner surface of the thyroid cartilage where the two laminae meet
Vocalis m. insertion
Vocal process and base of arytenoid cartilages
Vocalis m. action
Shorten vocal cords, lessens tension of vocal ligament, tensing small portions of vocal cord at a time, may play role in control of pitch
Vocalis m. innervation
Recurrent laryngeal n.
