Recording Pattern Visual Evoked Potentials Under Chloral Hydrate Sedation

Clinical electrophysiology and visual outcome in optic nerve hypoplasia

“…The electrophysiologic measures at our initial assessment most strongly linked to vision outcome are: VEP threshold category, amplitude of the flash VEP and amplitude of the N95 component of the PERG to 4° checks. Peak latencies were not useful to predict visual outcome (although sedation may alter VEP latencies,22 23 peak latencies are not prognostic in alert or in sedated children with ONH5 10). From fundus photographs, the anatomic measures of severity of ONH based on DD:DM ratio and presence of optic disc pallor were independently associated with visual outcome.…”

Clinical electrophysiology and visual outcome in optic nerve hypoplasia

“…The electrophysiologic measures at our initial assessment most strongly linked to vision outcome are: VEP threshold category, amplitude of the flash VEP and amplitude of the N95 component of the PERG to 4° checks. Peak latencies were not useful to predict visual outcome (although sedation may alter VEP latencies,22 23 peak latencies are not prognostic in alert or in sedated children with ONH5 10). From fundus photographs, the anatomic measures of severity of ONH based on DD:DM ratio and presence of optic disc pallor were independently associated with visual outcome.…”

Investigating neural correlates of conscious perception by frequency-tagged neuromagnetic responses

“…Previous EEG studies using a few occipital electrodes have reported that visual evoked potentials recorded over occipital cortex were suppressed when a rivalrous stimulus was introduced (10)(11)(12). Studies using orthogonal gratings that were modulated in counterphase (13) or tagged with different flicker frequencies (14) also reported that the amplitude of the visual evoked potential generated by the perceptually dominant stimulus was larger that that of the suppressed stimulus.…”

V-5 : Les POTENTIELS ÉVOQUÉS VISUELS corticaux (PEV)

“…Elles peuvent être rendues nécessaires pour l'examen du sujet, jeunes enfants très agités ou encéphalopathes, incapables d'un minimum de coopération. La sédation par hydrate de chloral (Wright et al 1986), (Fox & Wright, 1990) permet l'enregistrement des PEV chez des enfants de moins de 3 ans, sans modification significative des amplitudes ou temps de culmination par rapport à ce que est enregistré chez l'enfant vigile ; ce n'est pas le cas pour des enfants âgés de plus de 3 ans où les PEV sont, le plus souvent, non discernables après cette sédation.…”

Clinical electrophysiology and visual outcome in optic nerve hypoplasia

“…The electrophysiologic measures at our initial assessment most strongly linked to vision outcome are: VEP threshold category, amplitude of the flash VEP and amplitude of the N95 component of the PERG to 4° checks. Peak latencies were not useful to predict visual outcome (although sedation may alter VEP latencies,22 23 peak latencies are not prognostic in alert or in sedated children with ONH5 10). From fundus photographs, the anatomic measures of severity of ONH based on DD:DM ratio and presence of optic disc pallor were independently associated with visual outcome.…”

Investigating neural correlates of conscious perception by frequency-tagged neuromagnetic responses

“…Previous EEG studies using a few occipital electrodes have reported that visual evoked potentials recorded over occipital cortex were suppressed when a rivalrous stimulus was introduced (10)(11)(12). Studies using orthogonal gratings that were modulated in counterphase (13) or tagged with different flicker frequencies (14) also reported that the amplitude of the visual evoked potential generated by the perceptually dominant stimulus was larger that that of the suppressed stimulus.…”

V-5 : Les POTENTIELS ÉVOQUÉS VISUELS corticaux (PEV)

“…Elles peuvent être rendues nécessaires pour l'examen du sujet, jeunes enfants très agités ou encéphalopathes, incapables d'un minimum de coopération. La sédation par hydrate de chloral (Wright et al 1986), (Fox & Wright, 1990) permet l'enregistrement des PEV chez des enfants de moins de 3 ans, sans modification significative des amplitudes ou temps de culmination par rapport à ce que est enregistré chez l'enfant vigile ; ce n'est pas le cas pour des enfants âgés de plus de 3 ans où les PEV sont, le plus souvent, non discernables après cette sédation.…”

Clinical electrophysiology and visual outcome in optic nerve hypoplasia

“…The electrophysiologic measures at our initial assessment most strongly linked to vision outcome are: VEP threshold category, amplitude of the flash VEP and amplitude of the N95 component of the PERG to 4° checks. Peak latencies were not useful to predict visual outcome (although sedation may alter VEP latencies,22 23 peak latencies are not prognostic in alert or in sedated children with ONH5 10). From fundus photographs, the anatomic measures of severity of ONH based on DD:DM ratio and presence of optic disc pallor were independently associated with visual outcome.…”

Investigating neural correlates of conscious perception by frequency-tagged neuromagnetic responses

“…Previous EEG studies using a few occipital electrodes have reported that visual evoked potentials recorded over occipital cortex were suppressed when a rivalrous stimulus was introduced (10)(11)(12). Studies using orthogonal gratings that were modulated in counterphase (13) or tagged with different flicker frequencies (14) also reported that the amplitude of the visual evoked potential generated by the perceptually dominant stimulus was larger that that of the suppressed stimulus.…”

V-5 : Les POTENTIELS ÉVOQUÉS VISUELS corticaux (PEV)

“…Elles peuvent être rendues nécessaires pour l'examen du sujet, jeunes enfants très agités ou encéphalopathes, incapables d'un minimum de coopération. La sédation par hydrate de chloral (Wright et al 1986), (Fox & Wright, 1990) permet l'enregistrement des PEV chez des enfants de moins de 3 ans, sans modification significative des amplitudes ou temps de culmination par rapport à ce que est enregistré chez l'enfant vigile ; ce n'est pas le cas pour des enfants âgés de plus de 3 ans où les PEV sont, le plus souvent, non discernables après cette sédation.…”