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Fundamentals of Videonystagmography: Lesson 2: Spontaneous Testing, Gaze Testing, Head Shaking, and Hyperventilation

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1.  Which condition is spontaneous nystagmus without fixation most commonly associated with? Dry eyes Optic nerve hypoplasia Vestibular dysfunction Convergence insufficiency

2.  What does a positive head-shaking test indicate in terms of vestibular function? Increased cochlear response Improved visual acuity Vestibular asymmetry or dysfunction Enhanced proprioceptive feedback

3.  How is the direction of jerk nystagmus determined? By the amplitude of the slow phase By the direction of the fast phase By the duration of the oscillatory cycle By the velocity of the slow phase

4.  Which test is used to evaluate the integrity of the vestibulo-ocular reflex (VOR)? Audiometry test Tympanometry Gaze testing Pure tone audiogram

5.  Hyperventilation testing can reveal latent nystagmus due to its effect on what? Blood pressure CO2 levels in the blood Oxygen saturation Blood sugar levels