What type of nystagmus is typically seen in Meniere's disease?

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Multiple Choice

What type of nystagmus is typically seen in Meniere's disease?

Explanation:
Nystagmus direction reflects unilateral vestibular imbalance. In Ménière disease, the fluctuating endolymphatic hydrops creates a sudden, asymmetric input from one labyrinth, so the eyes develop a spontaneous nystagmus. The horizontal semicircular canals provide the strongest, most readily observed plane of eye movement in this setting, so the nystagmus is typically horizontal and beats away from the affected ear during an attack. Vertical or torsional nystagmus is less common and suggests involvement of other canals or central pathways, whereas diagonal patterns aren’t characteristic for Ménière’s.

Nystagmus direction reflects unilateral vestibular imbalance. In Ménière disease, the fluctuating endolymphatic hydrops creates a sudden, asymmetric input from one labyrinth, so the eyes develop a spontaneous nystagmus. The horizontal semicircular canals provide the strongest, most readily observed plane of eye movement in this setting, so the nystagmus is typically horizontal and beats away from the affected ear during an attack. Vertical or torsional nystagmus is less common and suggests involvement of other canals or central pathways, whereas diagonal patterns aren’t characteristic for Ménière’s.

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