CVT Assessment & Diagnosis of Vestibular Disorders 2

Question 1

During the head impulse test (HIT), a corrective saccade after a rapid head thrust indicates:

Accepted Answer

Reduced VOR gain on the ipsilateral semicircular canal

Answer

A corrective saccade following the head impulse indicates the VOR is insufficient to maintain gaze, reflecting ipsilateral canal hypofunction.

Question 2

The HINTS exam (Head Impulse, Nystagmus, Test of Skew) is primarily used to differentiate:

Accepted Answer

Peripheral vestibular neuritis from central stroke

Answer

HINTS distinguishes benign peripheral vestibular neuritis from dangerous posterior fossa stroke in acute vestibular syndrome.

Question 3

In caloric testing, a canal paresis (CP) is calculated using which formula?

Accepted Answer

(RW + RC − LW − LC) / (RW + RC + LW + LC) × 100

Answer

Canal paresis compares the sum of responses from one ear to the other, using Jongkees' formula with all four irrigations.

Question 4

A patient with Meniere's disease is MOST likely to show which pattern on electrocochleography (ECoG)?

Accepted Answer

Elevated SP/AP ratio above 0.4

Answer

Endolymphatic hydrops in Meniere's disease enlarges the summating potential, raising the SP/AP ratio above the normal threshold of approximately 0.4.

Question 5

Which finding on video head impulse testing (vHIT) is MOST consistent with superior semicircular canal dehiscence (SSCD)?

Accepted Answer

Normal VOR gain without corrective saccades

Answer

SSCD typically shows normal or even elevated VOR gain on vHIT because the dehiscence creates a third mobile window rather than reducing canal sensitivity.

(CVT) Certified Vestibular Therapist Practice Test

(CVT) Certified Vestibular Therapist Practice Test

CVT Assessment & Diagnosis of Vestibular Disorders 2