Recording of reversed Uhthoff's phenomenon by visual evoked potentials elicited by pseudorandom binary sequence stimulation

H. Mori, M. Kiyosawa, N. Nemoto, M. Mochizuki, K. Momose

Research output: Contribution to journalArticle

Abstract

Reversed Uhthoffs phenomenon is a temporal improvement of visual acuity initiated by body cooling in subjects with demyelinating optic neuropathy. Up until the present, it has been difficult to demonstrate Uhthoffs phenomenon by visually evoked potentials (VEPs). We have been able to demonstrate this phenomenon with VEPs elicited by pseudorandom binary sequence stimuli (PRBS-VEP). Case 1 was a 50-year-old woman with right optic neuropathy. Her right visual acuity was 0.02 and improvement of subjective visual acuity, and temporal frequency characteristics of the VEPs were seen after ingestion of cold water. Case 2 was a 29-year-old man with right optic neuropathy and multiple sclerosis. His right visual acuity was 0.4 and the visual acuity improved to 0.8 with ingestion of cold water. The amplitudes and temporal frequency characteristics of the VEPs were also improved. The amplitude of the first order kernel and the temporal frequency characteristics (TFC) of the VEPs were recorded successfully with PRBS-VEP during the short time period the patients exhibited the reversed Uhthoffs phenomenon.

Original languageEnglish
Pages (from-to)186-191
Number of pages6
JournalNeuro-Ophthalmology Japan
Volume18
Issue number2
Publication statusPublished - 2001 Jan 1

Keywords

  • Optic neuritis
  • Pseudorandom binary stimuli
  • Uhthoffs phenomenon
  • Visual evoked potentials (PRBS-VEP)
  • Water drinking

ASJC Scopus subject areas

  • Ophthalmology
  • Clinical Neurology

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