the larynx and hypopharynx - educational symposia · netter, atlas of human anatomy aryepiglottic...

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The Larynx and Hypopharynx Mari Hagiwara, MD ASHNR 2018 Larynx Phonation Maintenance of airway Protection against aspiration L O T H Netter, Atlas of Human Anatomy Thyroid cartilage Cricoid cartilage Arytenoid cartilages Cartilaginous Framework Netter, Atlas of Human Anatomy Epiglottis Teardrop shape fibrocartilage Tapers inferiorly to petiole Extremely flexible Protects AW against aspiration Netter, Atlas of Human Anatomy Aryepiglottic Folds Sweep downward and posteriorly from epiglottis to the arytenoid Pyriform sinus along lateral surface of each AE fold L H Netter, Atlas of Human Anatomy True Cords: vocal ligament and thyroarytenoid muscle Netter, Atlas of Human Anatomy http://www.usm.maine.edu/bio/courses/bio205/larynx_coronal.GIF

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Page 1: The Larynx and Hypopharynx - Educational Symposia · Netter, Atlas of Human Anatomy Aryepiglottic Folds • Sweep downward and posteriorly from epiglottis to the arytenoid • Pyriform

TheLarynxandHypopharynx

MariHagiwara,MDASHNR2018

Larynx

•  Phonation•  Maintenanceofairway•  Protectionagainstaspiration

L

O

T

H

Netter, Atlas of Human Anatomy

•  Thyroidcartilage•  Cricoidcartilage•  Arytenoidcartilages

Cartilaginous Framework

Netter, Atlas of Human Anatomy

Epiglottis

•  Teardropshapefibrocartilage

•  Tapersinferiorlytopetiole

•  Extremelyflexible•  ProtectsAWagainstaspiration

Netter, Atlas of Human Anatomy

AryepiglotticFolds

•  Sweep downward and posteriorly from epiglottis to the arytenoid •  Pyriform sinus along lateral surface of each AE fold

L

H

Netter, Atlas of Human Anatomy

TrueCords:vocalligamentandthyroarytenoidmuscle

Netter, Atlas of Human Anatomy http://www.usm.maine.edu/bio/courses/bio205/larynx_coronal.GIF

Page 2: The Larynx and Hypopharynx - Educational Symposia · Netter, Atlas of Human Anatomy Aryepiglottic Folds • Sweep downward and posteriorly from epiglottis to the arytenoid • Pyriform

Regions

•  Supraglottis•  Glottis•  Subglottis

Som PM and Curtin HD. Head and Neck Imaging, 4th ed.

G

Supraglottis

•  Fromtipofepiglottistoventricle

•  Epiglottis,AEfolds,falsecords,pre-epiglotticandparaglotticspaces,upperarytenoidcartilages

•  Robustlymphaticdrainagetohighdeepcervicalchain

My.statdx.com

Glottis

•  Truevocalcords–  Vocalligament–  Thyroarytenoidmuscle

•  Anteriorandposteriorcommissures(<1mm)

•  Sparselymphaticdrainage

Bodterms.weebly.com

Subglottis

•  FromundersurfaceofTVCtoinferiormarginofcricoidcartilage

•  Mucosalsurfacecloselyappliedtocricoidcartilage

Som PM and Curtin HD. Head and Neck Imaging, 4th ed.

Preepiglotticspace

•  Anteriortoepiglottis•  Filledwithfat,richlymphaticandmicrovascularnetwork

•  Contiguousoneithersidewithparaglotticspace

PES

Paraglotticspace

•  Lateralwalloflarynx,betweenmucosaandcartilages

•  Supraglottis:fat•  Glottis:TAM

•  InferiorlyterminatesatlevelofundersurfaceofTAM

S

G

Som PM and Curtin HD. Head and Neck Imaging, 4th ed.

Page 3: The Larynx and Hypopharynx - Educational Symposia · Netter, Atlas of Human Anatomy Aryepiglottic Folds • Sweep downward and posteriorly from epiglottis to the arytenoid • Pyriform

PES

LH

TAM

Hypopharynx

Netter, Atlas of Human Anatomy

Page 4: The Larynx and Hypopharynx - Educational Symposia · Netter, Atlas of Human Anatomy Aryepiglottic Folds • Sweep downward and posteriorly from epiglottis to the arytenoid • Pyriform

Hypopharynx

Netter, Atlas of Human Anatomy

Hypopharynx

Posterior hypopharyngeal wall

Pyriform sinuses

Post cricoid region