ERG oscillatory potentials in infants

Study the scotopic and photopic oscillatory potentials (OPs) of the electroretinogram (ERG) in 10-week old infants. Term-born 10-week old infants (n = 15) and adults (n = 12) were tested. Full-field ERGs were recorded under scotopic and photopic conditions. The records were filtered (75-300 Hz) to d...

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Bibliographic Details
Published in:Documenta ophthalmologica 2005-03, Vol.110 (2-3), p.265-270
Main Authors: MOSKOWITZ, Anne, HANSEN, Ronald M, FULTON, Anne B
Format: Article
Language:English
Subjects:
Adaptation, Ocular - physiology
Adolescent
Adult
Aging - physiology
Biological and medical sciences
Child
Electrodiagnosis. Electric activity recording
Electrooculography. Electroretinography
Electroretinography
Humans
Infant
Infant, Newborn
Investigative techniques, diagnostic techniques (general aspects)
Medical sciences
Photic Stimulation
Photoreceptor Cells, Vertebrate - physiology
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Summary:Study the scotopic and photopic oscillatory potentials (OPs) of the electroretinogram (ERG) in 10-week old infants. Term-born 10-week old infants (n = 15) and adults (n = 12) were tested. Full-field ERGs were recorded under scotopic and photopic conditions. The records were filtered (75-300 Hz) to demonstrate the oscillatory wavelets. The amplitudes and implicit times of the infants' OPs were compared to those in adults and also to amplitudes of the saturated photoreceptor responses. In infants, the mean OP amplitudes are similar in scotopic and photopic conditions and do not vary significantly with OP number. Infants' OPs are significantly smaller than in adults, with scotopic OPs averaging 19% of that in adults and photopic OPs averaging 47%, whereas the amplitudes of the saturated photoreceptor responses are 43% and 66% of those in adults. Mean interpeak intervals are similar in infants and adults, indicating oscillatory behavior at a frequency of 155 Hz in scotopic conditions and 135 Hz in photopic conditions. In young infants, the OPs are relatively immature compared to the photoreceptor responses, with the immaturity of the scotopic responses being more marked than that of the photopic responses.
ISSN:0012-4486
1573-2622
DOI:10.1007/s10633-005-1983-x