Larynx Anatomy

Anatomy Of Larynx

•  It is an organ of respiration and also phonation ( speech ).

• It is located in the upper part of the front of the neck in the midline.

•  It starts at the level of L3 vertebra and ends at the level of C6 vertebra by being continued as trachea.

• It is a longer in males than in females.

• It is composed of mostly cartilages which are connected to each other by muscles, membranes, ligaments and joint.

• Cartilages of larynx are 9 in number, 
  3 unpaired thyroid cartilage, cricoids cartilage and epiglottis.
  3 paired arystenoid cartilages, uneiform cartilages, corniculate cartilages.

• Thyroid cartilage is largest of all.

• Cricoid cartilage : signet ring shaped.

• Epiglottis : Leaf Like.

• Within the cavity of larynx, there are 2 pairs of folds, upper pair of vestiblar folds and lower pair of vocal folds.

• The movements of vocal folds are responsible for the production of voice

• These folds are dividing the cavity of larynx into 3 parts Supra glottis, glottis and infraglottis.

• Arterial Supply : Superior and inferior laryngeal arteries.

• Nerve Supply : Recurrent laryngeal nerve.

Applied Anatomy :

Aphonia : Injury to the recurrent laryngeal nerve will cause paralysis of vocal folds there by causing loss of voice. This condition is called as aphonia.

Related posts :