Image Based Question – 66631

What is the sensory nerve supply of the structure marked by an arrow in the image?

A. Recurrent Laryngeal Nerve

B. External Superior Laryngeal Nerve

C. Internal Superior Laryngeal Nerve

D. Glossopharyngeal Nerve

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Correct Answer » A Explanation

Ans:A. Recurrent Laryngeal Nerve

The arrow in the image points towards the Vocal cords..

Nerve Supply of Larynx

Sensory:

• The internal laryngeal nerve supplies the mucous membrane above the level of the vocal folds.

• The recurrent laryngeal nerve supplies the mucosa of the vocal cord and the subglottis (below the level of the vocal folds).

Motor:

• All intrinsic muscles of the larynx are supplied by the recurrent laryngeal nerve(Posterior cricoarytenoid , Lateral cricoarytenoid , Transverse arytenoid ,Oblique arytenoid ,Thyroarytenoid ) except for the cricothyroid which is supplied by the external laryngeal nerve.