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Changes in the visual evoked potentials of hydrocephalic children
Insights
Visual evoked potentials (VEPs) in hydrocephalic children show delayed P2 latency, particularly with increased head size in infants. Shunt placement improves VEPs slowly, with no change observed in older children during hydrocephalic episodes.
Area of Science:
- Pediatric Neurology
- Neurophysiology
- Developmental Pediatrics
Background:
- Hydrocephalus is a condition characterized by excess cerebrospinal fluid in the brain.
- Visual evoked potentials (VEPs) are electrophysiological tests used to assess the visual pathway's integrity.
- VEPs can be affected by neurological conditions like hydrocephalus.
Purpose of the Study:
- To investigate the impact of hydrocephalus on visual evoked potentials (VEPs) in children.
- To analyze how factors like age, ventriculomegaly, head size, and shunting influence VEPs.
Main Methods:
- Studied visual evoked potentials (VEPs) in 84 children with hydrocephalus (2 days to 15 years).
- Analyzed VEPs in relation to age, ventriculomegaly, head size, and shunt status.
- Assessed the P2 wave latency in VEP recordings.
Main Results:
- Infants with hydrocephalus showed increased P2 latency, consistently when ventriculomegaly was coupled with enlarged head circumference.
- VEP improvement following shunt placement was gradual.
- No significant changes in P2 latency were observed in older children during acute hydrocephalic episodes.
Conclusions:
- VEP abnormalities in pediatric hydrocephalus are influenced by head size and age.
- Shunting provides a slow VEP recovery, suggesting potential long-term visual pathway effects.
- VEP monitoring may offer insights into visual pathway function in hydrocephalic children.
Abstract:
The visual evoked potentials (VEPs) of a group of 84 hydrocephalic children, aged between 2 days and 15 years, were studied. The variables analyzed were age, ventriculomegaly, head size, and the presence or absence of a functioning shunt. In infants, an increase in the latency of the primary positive wave (P2) was confirmed, but this was present consistently only when ventriculomegaly was accompanied by increased head size. Improvement in the VEP was slow to follow shunting. No change in the latency of P2 was found during hydrocephalic episodes in older children.