Neurogenic Voice Disorders Quiz

Which cranial nerve is responsible for the motor input to the cricothyroid muscle?

• Superior laryngeal branch (external)

• Recurrent laryngeal branch

• Superior laryngeal branch (internal)

• Pharyngeal branch

What are the possible etiologies of a lesion in the cranial nerve X (Vagus)?

What is the main symptom of a lesion in the pharyngeal branch of the vagus nerve?

• Soft palate droops

• Uvula pulled to unaffected side

• Paralysis of vocal folds

• Hypernasal sound

What is the effect of a unilateral lesion in the recurrent laryngeal branch of the vagus nerve?

• Weak/soft voice

• Hypernasal sound

• Paralysis of vocal folds

• Inspiratory stridor and aphonia

Which muscles are affected by a lesion in the superior laryngeal branch of the vagus nerve?

• All of the above

• Pharyngeal muscles

• Intrinsic muscles of the larynx

• Cricothyroid muscle

What is the most common neurologic voice disorder?

What is the voice characteristic of adductor spasmodic dysphonia?

• Strained-strangled voice stoppages

• Involuntary breathy bursts

• Intermittent voice arrests

• Hoarseness

What is the voice characteristic of abductor spasmodic dysphonia?

• Intermittent voice arrests

• Hoarseness

• Involuntary breathy bursts

• Strained-strangled voice stoppages

What is the cause of spasmodic dysphonia?

• All of the above

• Disordered or lost myelin of the recurrent laryngeal nerve

• Lesion to the basal ganglia/extrapyramidal system

• Overactivity of the thyroarytenoid muscles

Which gender is more commonly affected by adductor spasmodic dysphonia?

• Men

• Women

• None of the above

• Both equally