Term
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Definition
suspends larynx
Stylohyoid
Epihyoid
Ceratohyoid
Basihyoid
Thyrohyoid |
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Term
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Definition
Guards the entrance to the trachea during swallowing: ‘Swings’ backwards and forwards during swallowing
Regulates the amount of air entering lower respiratory passageways: Adduction (close) and abduction (open) of the glottis
Vocalisation |
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Term
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Definition
5 main cartilages
Epiglottis
Thyroid cartilage
Cricoid Cartilage
Arytenoid cartilage (paired) |
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Term
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Definition
Articulates thyroid cartilage
Tips caudally during swallowing
Elastic cartilage |
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Term
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Definition
U shaped: 2 Lateral plates fuse ventrally
Articulates: Thyrohyoid bone and arch of the Cricoid cartilage
Laryngeal prominence (Adams apple)
Hyaline cartilage (ossifies with age) |
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Term
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Definition
Signet ring (wide dorsally, narrow ventrally)
Stabilising role
Articulates: Arytenoids and Thyroid cartilages
Linked by Cricotracheal lig. to Trachea
Hyaline cartilage (ossifies with age) |
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Term
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Definition
paired
Irregular form- but best described as pyramidal
Situated: dorsal and medial to Thyroid cartilage (T)
Articulate laterally with Cricoid cartilage
Mainly hyaline cartilage |
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Term
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Definition
Entrance to the larynx
Formed by epiglottis, corniculate process of arytenoid cartilages and aryepigottic fold |
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Term
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Definition
Narrow
Boundaries - vocal process of the Arytenoid cartilages - vocal folds - thyroid cartilage |
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Term
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Definition
Epiglottis : rounded
Short and deep
Smooth interior
No vestibular folds / lateral ventricles/no cuneiform processes
Glottis: narrow |
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Term
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Definition
Long and narrow
Epiglottis: Large round apex
Arytenoid cartilage: Bifid Corniculate process
Lateral ventricles & Median recess |
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Term
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Definition
Epiglottis pointed
Prominent Corniculate processes on arytenoids
Cuneiform processes assoc. epiglottis
Lateral ventricles and median recess
Thyroid notch large- good access for surgery |
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Term
| Extrinsic Muscles of the Larynx |
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Definition
Muscles of pharynx/tongue/hyoid apparatus move larynx ROSTRALLY: e.g. Geniohyoid m. and Hypoglossus m. Innervated by XII
Ventral hyoid muscles move Larynx CAUDALLY: e.g Sternohyoid m.; Sternothyroid m.; Thryohyoid m. Innervated by ventral br’s of cervical spinal nn and CN XI |
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Term
| Intrinsic Muscles of the Larynx |
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Definition
Dorsal Cricoarytenoid m: Abductor
Transverse Arytenoid m: Adductor - closes the glottis
Cricothyroid m. Lengthens/Tensions vocal folds (coarse adjustment)
Lateral Cricoarytenoid m: Adducts vocal process, closes glottis
Thyroarytenoid mm adjusts vocal folds (fine tune)
All innervated by Innervated by Cd. (recurrent) laryngeal n, except cricothyroid (cranial) |
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Term
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Definition
Swallowing/Breathing - control of where everything passes
Quiet/Rapid breathing - controls amount of air passing into trachea
Vocalization |
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