Question

The recurrent laryngeal nerve supplies all muscles of the larynx except:

• A. Cricothyroid
• B. Lateral cricoarytenoid
• C. Oblique cricoarytenoid
• D. Vocalis

Hint:

Remember — cricothyroid is the only laryngeal muscle supplied by the superior laryngeal nerve, not the recurrent branch.

Answer 1

The Correct Option is A

The recurrent laryngeal nerve, a branch of the vagus nerve, supplies all intrinsic muscles of the larynx except the cricothyroid muscle.
The cricothyroid is instead innervated by the external branch of the superior laryngeal nerve, which is also a branch of the vagus nerve.
Muscles like the lateral cricoarytenoid, oblique cricoarytenoid, and vocalis are all supplied by the recurrent laryngeal nerve.
Therefore, the only exception is the cricothyroid muscle.