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
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.
PES
LH
TAM
Hypopharynx
Netter, Atlas of Human Anatomy
Hypopharynx
Netter, Atlas of Human Anatomy
Hypopharynx
Posterior hypopharyngeal wall
Pyriform sinuses
Post cricoid region
