From immature to mature pattern ERG and VEP

Brecelj, Jelka

doi:10.1023/b:doop.0000005330.62543.9c

Cited by 66 publications

(47 citation statements)

References 33 publications

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“…Studies of the development of VEP [23][24][25][26][27][28][29][30][31] and ERG [23,24,[32][33][34][35][36][37] responses in normal subjects provide the evidence upon which strategies for clinical pediatric testing are built. Publications discuss selection of pediatric stimuli and recording conditions.…”

Section: Introductionmentioning

confidence: 99%

Pediatric clinical visual electrophysiology: a survey of actual practice

et al. 2006

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Section: Introductionmentioning

confidence: 99%

Pediatric clinical visual electrophysiology: a survey of actual practice

et al. 2006

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“…This technique has proved to be useful in assessing certain aspects of the visual function and maturation [4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Flash Visually Evoked Potentials in the Newborn and their Maturation During the First Six Months of Life

et al. 2005

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The aim of this paper has been to obtain normative data for the major components of the visually evoked potentials obtained by flash stimulus (F-PEV) in the newborn, and to analyse the evolution of these responses during the first 24 weeks of life. In order to do so, F-VEP were recorded in 109 normal full-term newborn infants. Fifty-five of these infants were also studied longitudinally at 4, 8, 12 and 24 weeks. We recorded responses in all newborns. A great morphological variability was observed. P2 was the only component present in all of these infants. Early components, which were always present from the fourth week of life on, were recorded in 34% of the newborns. There were significant differences according to waking/sleep state. At 24 weeks the most characteristic response was a triphasic waveform with clear negative-positive-negative components at 67.9, 110 and 158.3 ms. The morphological variability observed in the F-PEV of the newborn and the presence of early components in some cases, suggest differences in the maturation of the specific and unspecific visual system at birth. The study of these responses provides us with information about certain aspects of visual maturation. The relative stability of P2 response of the newborn and of the early negative components later on, made them the most useful components to be used in paediatric clinical work . The latency of P2 in the newborn is the parameter that showed lower variability, and therefore the most suitable one to establish normative data.

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“…One source may be the different skull thicknesses between infants and adults [25,54,58]. Other possibilities are that it is due to the greater number of synapses in infants and young children [59] or an increasing contribution of the fovea to the VEP and/or maturation of the visual cortex [60]. Another factor is that the thresholds are obtained in different ways.…”

Section: Discussionmentioning

confidence: 99%

Threshold determination in sweep VEP and the effects of criterion

et al. 2009

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In order to develop criteria for the range of data points used for regression line fitting in sweep visually evoked potential (sVEP), which would be objective, clearly specified and give good repeatability and validity, and in order to investigate the effect of luminance on sVEP measurement, visual acuity (VA) and contrast sensitivity (CS) were measured with sVEP in adults aged 17-30 years and children aged 6-8 years. Six to ten participants took part in each experiment. Five criteria (C0-C4) for fitting the regression line were implemented. Test-retest repeatability and validity against psychophysical thresholds at three luminance levels were considered for thresholds and the number of acceptable readings. There were significant effects of criteria (repeated measures ANOVAs, P < 0.05). The criteria, C2 and C3 (based on the range over which the signal-to-noise ratio >or=1), consistently gave better VA and CS, more viable readings, better agreement with psychophysical thresholds in adults and better repeatability than the other criteria. In the case of adults, C2 gave thresholds that were not significantly different from the psychophysical thresholds (P > 0.05). There was little effect of luminance over the 25-100 cd/m(2) range used. Overall, C2 performed the best and would be the criterion of choice, giving better repeatability, better validity and more viable plots.

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From immature to mature pattern ERG and VEP

Cited by 66 publications

References 33 publications

Pediatric clinical visual electrophysiology: a survey of actual practice

Pediatric clinical visual electrophysiology: a survey of actual practice

Flash Visually Evoked Potentials in the Newborn and their Maturation During the First Six Months of Life

Threshold determination in sweep VEP and the effects of criterion

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