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Developmental changes of pattern reversal visual evoked potentials
1Department of Pediatrics, School of Medicine, Nagoya University, Japan.
Insights
Pattern reversal visual evoked potentials (PVEPs) in children show that P2 latency matures by age 2. Binocular stimulation yields shorter P2 latency than monocular, with some sex differences observed in older children.
Area of Science:
- Neuroscience
- Developmental Neuroscience
- Ophthalmology
Background:
- Visual evoked potentials (VEPs) are crucial for assessing visual pathway development.
- Pattern reversal VEPs (PVEPs) provide objective measures of visual function.
- Understanding normative developmental changes in PVEPs is essential for diagnosing visual impairments.
Purpose of the Study:
- To analyze developmental changes in pattern reversal visual evoked potentials (PVEPs) in children.
- To establish normative data for PVEP parameters across a wide age range.
- To investigate the influence of age, stimulation type, and sex on PVEP development.
Main Methods:
- Analysis of PVEPs in 141 normal children aged 1 month to 19 years 4 months.
- Stimulus: Black and white checkerboard pattern (50 min arc check edge) on a TV screen.
- Recorded major positive peak (P2) latency and amplitudes (N1-P2, P2-N2) under monocular and binocular conditions.
Main Results:
- The P2 peak was observed in all subjects; other peaks increased with age.
- P2 latency rapidly decreased in the first six months, stabilizing by age 2 years.
- Binocular P2 latency was significantly shorter than monocular; sex differences in latency were noted between 8-11 years.
- Amplitude developmental changes were unclear with large inter-age standard deviations, limiting clinical use.
Conclusions:
- PVEP maturation, particularly P2 latency, is largely complete by age 2 years.
- Binocular stimulation offers a more efficient assessment of visual pathway maturation than monocular.
- While PVEP latency shows clear developmental trends, amplitude variability currently limits its clinical diagnostic utility in children.
Abstract:
Analysis of developmental changes in pattern reversal visual evoked potentials (PVEPs) was performed on 141 normal children ranging in age from 1 month to 19 years 4 months. The stimulus was a black and white checkerboard pattern on a television screen, and the check edge subtended 50 min of retinal arc. The major positive peak (P2) was observed in all subjects, and the incidence of other peaks tended to increase with age. The P2 latency decreased rapidly during the first six months of life and reached a constant value after the age of 2 years. The P2 latency with monocular stimulation was significantly longer than that with binocular stimulation in most age groups. Developmental changes of the N1-P2 or P2-N2 amplitudes were unclear, and the standard deviation of the amplitude in each age was too large for clinical application. The P2 latency with binocular stimulation was shorter for females than for males only at the age of 8-11 years.