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5 Cards in this Set
- Front
- Back
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THYRO-ARY-TENOID-EUS
OIA -INFEROMEDIAL FIBERS |
E. Thyroarytenoideus
1. Origin: groove formed by the thyroid laminae, lateral to the attachments of the vestibular and vocal folds 2. Insertion: lateral border of the arytenoid cartilage 3. Action: adducts the vocal ligament as the muscle thickens during con- traction; decreases the tension of the vocal ligament as it draws the arytenoid cartilage toward the thyroid cartilage 4. Its inferomedial fibers lie within the vocal fold, attach along the vocal ligament, and comprise the vocalis muscle; the vocalis varies the length and tension of the vibrating portion of the vocal ligament to produce variations in pitch |
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THYRO-EPI-GLOTTICUS
OIAI |
F. Thyroepiglotticus
1. Origin: groove formed by the thyroid laminae, superior to the thyro- arytenoideus 2. Insertion: lateral margin of the epiglottis 3. Action: holds the epiglottis against the laryngeal aditus during degluti- tion |
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MUSCLES OF THE LARYNX
INNERVATION |
G. Innervation: recurrent laryngeal nerve, except the cricothyroid, which is
innervated by the external laryngeal nerve |
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NERVES OF THE LARYNX
SUPERIOR LARYNGEAL NERVE -DESCENDS HOW? -DIVIDES INTO? |
IV. Nerves
A. Superior laryngeal nerve 1. Descends lateral to the pharynx; divides into the internal and external laryngeal nerves posterosuperior to the tip of the greater cornu of the hyoid, medial to the external carotid artery |
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NERVES OF THE LARYNX
SUPERIOR LARYNGEAL NERVE -internal laryngeal nerve |
A. Superior laryngeal nerve
2. Internal laryngeal nerve: penetrates the thyrohyoid membrane with the superior laryngeal artery, in the gap between the middle and inferior pharyngeal constrictors; descends within the mucosa of the piriform recess and provides sensory innervation to the laryngeal mucosa supe- rior to the vocal folds |
