Defective visual inhibition in photosensitive idiopathic generalized epilepsy

Epilepsia
Gionata StrigaroR Cantello

Abstract

To assess the visual system excitability of photosensitive patients with idiopathic generalized epilepsy (IGE) with the paired-pulse flash-evoked potential (paired F-VEP) technique. We studied 19 photosensitive patients with IGE (16 women) showing a photoparoxysmal electroencephalographic (EEG) response (PPR). Twenty-two normal subjects of similar age and sex acted as controls (17 women). We recorded F-VEPs from occipital and central electrodes. Stimuli were single flashes, intermingled to flash pairs at the interstimulus interval (ISI) of 333, 125, 62.5, 50, 33, and 16.5 msec (i.e., at the internal frequency of 3, 8, 16, 20, 30, and 60 Hz). Recordings were done both with closed and open eyes. The single F-VEP was split into a "main complex" and a "late response," which were measured separately. As to paired stimuli, the "test" F-VEP emerged from electronic subtraction of the single F-VEP to the paired F-VEP. Grouped data were analyzed by means of nonparametric analyses of variance (ANOVAs). In patients, the single F-VEP showed some enhanced components in its early "main complex." Then, the "test" F-VEP behaved differently than controls, particularly if recorded with closed eyes, when the normal inhibition was abolished at give...Continue Reading

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Citations

Sep 24, 2015·Epilepsia·Gionata StrigaroRoberto Cantello
Mar 13, 2015·The Journal of Physiology·Gionata StrigaroJohn C Rothwell
Aug 29, 2012·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·F BrigoL G Bongiovanni
Dec 3, 2015·Lancet Neurology·Matthias J KoeppSándor Beniczky
Aug 19, 2014·Annals of Neurology·Anna Elisabetta VaudanoStefano Meletti
Jan 15, 2015·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Gionata StrigaroRoberto Cantello
Jul 29, 2015·Seizure : the Journal of the British Epilepsy Association·Gionata StrigaroRoberto Cantello
Jul 14, 2016·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Tommaso BocciFerdinando Sartucci
Jul 30, 2016·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Annika A de GoedeMichel J A M van Putten
Mar 24, 2017·Brain : a Journal of Neurology·Anna Elisabetta VaudanoStefano Meletti
Sep 26, 2014·Clinical EEG and Neuroscience·Gionata StrigaroJohn C Rothwell
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Nov 25, 2018·Documenta Ophthalmologica. Advances in Ophthalmology·Dorota Pojda-WilczekSebastian Sirek
Mar 15, 2021·Epilepsy Research·Gionata StrigaroRoberto Cantello

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