aalnuaimisheffieldacuk E mail abdulameerhyahoocom Prof Abdulameer Al Nuaimi Larynx extends from tip of epiglottis C3 to lower edge of cricoid cartilage C6 It is formed of cartilaginous framework connected by ligaments and muscles and lined by mucous membrane ID: 932534
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Slide1
Anatomy of larynx
E-mail: a.al-nuaimi@sheffield.ac.ukE. mail: abdulameerh@yahoo.com
Prof. Abdulameer Al-Nuaimi
Slide2Larynx, extends from tip of epiglottis C3, to lower edge of
cricoid cartilage C6.It is formed of cartilaginous framework, connected by ligaments and muscles, and lined by mucous membrane.Laryngeal cartilages:A- Single cartilages1- Thyroid
2- Cricoid 3- EpiglottisB- Paired cartilages1-
Arytenoid
2-Corniculate
3-Cuneiform
Slide3Pharynx and larynx
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Slide4Relations of larynx
Slide5Laryngeal mucosaLarynx is lined by pseudo stratified ciliated columnar epithelium, with goblet cells (respiratory epithelium)
Except the followings (they are covered by stratified squamous epithelium) 1-True vocal cords2-Tip of epiglottis 3-Aryepiglottic fold
Slide6Thyroid cartilage
Skeleton of larynx
Slide7Slide8Slide9Laryngeal cartilages
Slide10Lamina of Cricoid cart
Arytenoid cart
aryt
Thy
Laryngeal cartilages
Slide11Joints and membranes of larynx
Joints Cricothyroid joitCrico-arytenoid jointMembranes
Conus elasticusAryepiglottic membraneThrohyoid membrane
Slide12Laryngeal joints
Cricothyroid joint
Crico
-arytenoid
joint
C
Slide13Conus
elasticus
Larynx viewed from above
Arytenoid cartilage
Rima
glottidis
Slide14(Conus
e
lasticus)
(Aryepiglottic fold)
Laryngeal membranes
Vestibular ligament
Aryepiglottic ligament
Thyrohyoid
membrane
Aryepiglottic fold
Slide15Muscles of larynx
Cricothyroid muscle Posterior Crico-arytenoid muscleLateral Crico-arytenoid muscle
Transverse arytenoid muscleAry-epiglottic muscleThyro-arytenoid muscle on the conus elasticus
Vocalis
muscle
Thyro-epiglottic
muscle
Slide16Larynx
Anatomy of Larynx
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Laryngeal sinus
Larynx coronal section
Slide17Posterior view of the larynx showing muscles of the larynx
Slide18Thyro-epiglottic
muscle
Slide19Muscles of larynx
Slide20Rima
glottidis
Adduction of
vocal cords
Abduction of vocal cords
Due to abduction of arytenoid
Abduction of vocal cords
Due to rotation of arytenoids
Rima
glottidis
Rima
glottidis
Slide21Nerve supply
1- Motor: all muscles are supplied by Recurrent laryngeal nerve, except crico-thyroid muscle which is supplied by external branch of superior laryngeal nerve.2- Sensory: Above vocal folds: by the internal branch of Superior laryngeal nerveBelow vocal folds: by Recurrent laryngeal nerve.
Slide22Nerve supply of the larynx
Slide23Nerve supply of larynx
Slide24Nerve supply of larynx
Slide25Thank You
Sheffield Town Hall