Studies of human visual pathophysiology with visual evoked potentials

Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology
Shozo Tobimatsu, Gastone G Celesia

Abstract

Visual evoked potentials (VEPs) offer reproducible and quantitative data on the function of the visual pathways and the visual cortex. Pattern reversal VEPs to full-field stimulation are best suited to evaluate anterior visual pathways while hemi-field stimulation is most effective in the assessment of post-chiasmal function. However, visual information is processed simultaneously via multiple parallel channels and each channel constitutes a set of sequential processes. We outline the major parallel pathways of the visual system from the retina to the primary visual cortex and higher visual areas via lateral geniculate nucleus that receive visual input. There is no best method of stimulus selection, rather visual stimuli and VEPs' recording should be tailored to answer specific clinical and/or research questions. Newly developed techniques that can assess the functions of extrastriate as well as striate cortices are discussed. Finally, an algorithm of sequential steps to evaluate the various levels of visual processing is proposed and its clinical use revisited.

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Citations

Mar 17, 2011·Documenta Ophthalmologica. Advances in Ophthalmology·Mitja Benedičič, Roman Bošnjak
Jul 20, 2011·Documenta Ophthalmologica. Advances in Ophthalmology·Koichi ShibataKuniaki Otuka
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Dec 17, 2009·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Silvia Bisti
Jul 28, 2009·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Choji ObayashiShozo Tobimatsu
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May 6, 2008·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·N AccorneroM La Riccia
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Jun 19, 2010·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Graham E HolderUNKNOWN International Federation of Clinical Neurophysiology

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