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A 77-year-old man developed acute vertigo and unsteady gait. Neurological examination revealed spontaneousleft-beating nystagmus in the primary position. He fell to the left when walking without support. Magnetic resonanceimaging showed an acute infarction involving the right parieto-temporal lobe. Although the vertigo and unsteady gaitare most often associated with vestibular disorders involving the infratentorial structures, those may occur in cerebralinfarction of the parieto-temporal lobe. (Korean J Clin Neurophysiol 2014;16:32-34)