CVT Gaze Stabilization & Oculomotor Assessment

Question 1

Which reflex is primarily responsible for maintaining stable gaze during head movement?

Accepted Answer

Vestibulo-ocular reflex (VOR)

Answer

Optokinetic reflex

Answer

Cervico-ocular reflex

Answer

Smooth pursuit reflex

Question 2

VOR gain is defined as:

Accepted Answer

The ratio of eye velocity to head velocity

Answer

The ratio of head velocity to eye velocity

Answer

The frequency of eye movements during head rotation

Answer

The latency of eye movement response to head movement

Question 3

Which of the following best describes the function of gaze stabilization exercises (GSE)?

Accepted Answer

To enhance VOR adaptation through repeated head movements with visual targets

Answer

To improve smooth pursuit eye movements at rest

Answer

To train saccadic eye movements between stationary targets

Answer

To reduce sensitivity to optokinetic stimulation

Question 4

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

Accepted Answer

Impaired semicircular canal function on the tested side

Answer

Normal VOR function on the tested side

Answer

Central vestibular pathology only

Answer

Intact otolith organ function

Question 5

The horizontal VOR arc is mediated primarily through which cranial nerve pathway?

Accepted Answer

CN VIII connecting to CN VI and CN III via the MLF

Answer

CN V to CN VI

Answer

CN VI to CN IV directly

Answer

CN IV to CN III via the cerebellum

Question 6

The video head impulse test (vHIT) primarily assesses which aspect of vestibular function?

Accepted Answer

High-frequency semicircular canal function

Answer

Otolith organ function at low frequencies

Answer

Central vestibular processing in the brainstem

Answer

Visual-vestibular interaction during slow movement

Question 7

Which condition is most associated with reduced VOR gain and overt corrective saccades on vHIT testing?

Accepted Answer

Unilateral vestibular neuritis

Answer

Benign paroxysmal positional vertigo (BPPV)

Answer

Mal de débarquement syndrome

Answer

Superior semicircular canal dehiscence