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Related Experiment Videos

Pattern ERG and VEP maturation in schoolchildren.

Jelka Brecelj1, M Strucl, I Zidar

  • 1Eye Clinic, University Medical Centre, Zaloska c. 29a, 1525 Ljubljana, Slovenia. jelka.brecelj@kclj.si

Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology
|November 6, 2002
PubMed
Summary

Visual system maturation continues through childhood and adolescence. Age-related changes in pattern electroretinograms (PERG) and pattern visual evoked potentials (PVEP) reveal ongoing development in central retinal and postretinal pathways.

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Area of Science:

  • Ophthalmology
  • Neuroscience
  • Developmental Biology

Background:

  • The visual system's maturation is crucial for visual function.
  • Previous studies primarily focused on visual maturation in early childhood (under 6 years).
  • The trajectory of visual system development during later childhood and adolescence remains less understood.

Purpose of the Study:

  • To investigate age-dependent changes in pattern electroretinograms (PERG) and pattern visual evoked potentials (PVEP) in children aged 7-18 years.
  • To elucidate the timeline of visual system maturation throughout childhood and adolescence.
  • To identify specific electrophysiological markers of ongoing visual development.

Main Methods:

  • PERG and PVEP were recorded using skin electrodes and a 5-electrode system, respectively.

Related Experiment Videos

  • Pattern-reversal stimuli (50' checks) were presented to full and half visual fields.
  • Macular (N70, P100, N145) and paramacular (P80, N105, N135) waves were analyzed.

    • Main Results:

    • An age-dependent decrease in PERG P50 amplitude and PVEP P100 latency was observed for both eyes, indicating central retinal and postretinal maturation.
    • Waveform alterations in response to half-field stimulation were noted.
    • The paramacular N105 wave amplitude decreased with age, suggesting increasing macular predominance in visual processing.

    Conclusions:

    • Electrophysiological maturation of the central retina and postretinal pathways continues throughout childhood.
    • Age-dependent PVEP changes correlate with known visual cortex maturation extending into puberty and beyond.
    • These findings highlight the prolonged developmental period of the visual system in children and adolescents.