• Nystagmoid eye movements elicited by humming loudly was initially misdiagnosed as Tullio's phenomenon (abnormal acoustical stimulation of the vestibular apparatus owing to labyrinthine fistula). Further workup lead to a final diagnosis of a form of voluntary nystagmus characterized in some reports as "hysterical nystagmus." Some of the characteristics of this example of voluntary nystagmus differed from generally accepted descriptions.
(Arch Otolaryngol 105:288-289, 1979)
Coats AC, McCrary JA. Voluntary Nystagmus Masquerading as Tullio's Phenomenon. Arch Otolaryngol. 1979;105(5):288–289. doi:10.1001/archotol.1979.00790170058018
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