Anatomy of larynx Prof Abdulameer AlNuaimi Email a
Anatomy of larynx Prof. Abdulameer Al-Nuaimi E-mail: a. al-nuaimi@sheffield. ac. uk E. mail: abdulameerh@yahoo. com
Larynx, extends from tip of epiglottis C 3, to lower edge of cricoid cartilage C 6. It is formed of cartilaginous framework, connected by ligaments and muscles, and lined by mucous membrane. Laryngeal cartilages: A- Single cartilages 1 - Thyroid 2 - Cricoid 3 - Epiglottis B- Paired cartilages 1 - Arytenoid 2 -Corniculate 3 -Cuneiform
Pharynx and larynx www. google. co. uk/search?
Relations of larynx
Laryngeal mucosa Larynx 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 cords 2 -Tip of epiglottis 3 -Aryepiglottic fold
Skeleton of larynx Thyroid cartilage
Laryngeal cartilages
Laryngeal cartilages Arytenoid cart Thy aryt Lamina of Cricoid cart
Joints and membranes of larynx Joints Cricothyroid joit Crico-arytenoid joint Membranes Conus elasticus Aryepiglottic membrane Throhyoid membrane
Laryngeal joints Cricothyroid joint Crico-arytenoid joint C
Rima glottidis Arytenoid cartilage Conus elasticus Larynx viewed from above
(Aryepiglottic fold) Thyrohyoid membrane Aryepiglottic ligament Aryepiglottic fold Vestibular ligament (Conus elasticus) Laryngeal membranes
Muscles of larynx Cricothyroid muscle Posterior Crico-arytenoid muscle Lateral Crico-arytenoid muscle Transverse arytenoid muscle Ary-epiglottic muscle Thyro-arytenoid muscle on the conus elasticus Vocalis muscle Thyro-epiglottic muscle
Larynx www. google. co. uk/search? Laryngeal sinus Anatomy of Larynx coronal section
Posterior view of the larynx showing muscles of the larynx
Thyro-epiglottic muscle
Muscles of larynx
Abduction of vocal cords Due to abduction of arytenoid Rima glottidis Abduction of vocal cords Due to rotation of arytenoids Rima glottidis Adduction of vocal cords
Nerve 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 nerve Below vocal folds: by Recurrent laryngeal nerve.
Nerve supply of the larynx
Nerve supply of larynx
Nerve supply of larynx
Sheffield Town Hall Thank You
- Slides: 25