Visual evoked potentials to red-green stimulation in schoolchildren

The aim is to study chromatic visual evoked potentials (VEP) to isoluminant red-green (R-G) stimulus in schoolchildren. Sixty children (7–19 years) with normal color vision were examined, 30 binocularly and 30 monocularly. The isoluminant point was determined for each child subjectively by using het...

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Bibliographic Details
Published in:Visual neuroscience Vol. 23; no. 3-4; pp. 447 - 451
Main Authors: POMPE, MANCA TEKAVČIČ, KRANJC, BRANKA STIRN, BRECELJ, JELKA
Format: Journal Article
Language:English
Published: New York, USA Cambridge University Press 01.05.2006
Subjects:
Adolescent
Adult
Adults
Age Factors
Age-dependent changes
Changes
Child
CHROMATIC CODING
Chromatic stimulus
Color
Color Perception - physiology
Evoked Potentials, Visual - physiology
Evoked Potentials, Visual - radiation effects
Female
Flicker Fusion - physiology
Frequencies
Humans
Male
Photic Stimulation - methods
Photometry - methods
Reaction Time - physiology
Studies
Technical support
Vision, Ocular - physiology
Visual evoked potentials
Visual Pathways - physiology
Age-dependent changes
Visual evoked potentials
Chromatic stimulus
ISSN:0952-5238, 1469-8714
Online Access:Get full text
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Summary:The aim is to study chromatic visual evoked potentials (VEP) to isoluminant red-green (R-G) stimulus in schoolchildren. Sixty children (7–19 years) with normal color vision were examined, 30 binocularly and 30 monocularly. The isoluminant point was determined for each child subjectively by using heterochromatic flicker photometry, and objectively from recordings. The stimulus was a 7° circle composed of horizontal sinusoidal gratings, with spatial frequency 2 cycles/degrees and 90% contrast, presented in onset-offset mode. VEP were recorded from Oz (mid-occipital) position. Age-dependent waveform changes and changes of the positive and negative wave were studied to both binocular and monocular R-G stimulation. Age-dependent waveform changes were observed to binocular and monocular R-G stimulation. In younger children the positive wave was prominent, whereas in older children also the negative wave became more evident. The latency of the positive wave decreased linearly with age to R-G binocular stimulation. To monocular stimulation no significant changes of the latency were observed. The amplitude of the positive wave dropped exponentially with age to binocular and monocular stimulation. The latency of the negative wave increased linearly with age to binocular and monocular stimulation, whereas the amplitude did not show age-dependent changes. These findings suggest that the chromatic VEP response undergoes evident age-dependent changes during the school-age period.
Bibliography:istex:DC0A87ED3EF50449CAB8BC19DBA0A1016EA4B581
PII:S0952523806233108
ark:/67375/6GQ-ZJ12TX9K-Q
PMID:16961979
ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
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ISSN:0952-5238
1469-8714
DOI:10.1017/S0952523806233108