Paralysis of recurrent laryngeal nerve does not affect function of:: (A) Thyroarytenoid, (B) Lateral cricoarytenoid, (C) Vocalis, (D) Cricothyroid
Answer is D. Cricothyroid muscle which lies outside the larynx is supplied by external laryngeal nerve - a branch of superior laryngeal nerve of vagus. This is the only laryngeal muscle not supplied by recurrent laryngeal nerve.