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[Evoked parietal spikes in the electroencephalogram and febrile convulsions]
1Departamento de Neuropsiquiatria, Faculdade de Ciências Médicas, Pontifícia Universidade Católica de Campinas, Brasil.
Insights
In a study of children, high-voltage evoked potentials (evoked spikes) on EEG were found in 2.99% of subjects. A link was observed between evoked spikes and febrile convulsions, suggesting potential genetic factors and a need for further epilepsy risk research.
Area of Science:
- Neurophysiology
- Pediatric Neurology
- Clinical Electrophysiology
Context:
- Electroencephalography (EEG) is crucial for diagnosing neurological conditions in children.
- Evoked potentials, specifically evoked spikes, are EEG patterns that can indicate underlying brain activity.
- Febrile convulsions are common in childhood and can sometimes be associated with EEG abnormalities.
Purpose:
- To investigate the prevalence of high-voltage evoked potentials (evoked spikes) in a pediatric population.
- To examine the association between evoked spikes and a history of febrile convulsions.
- To explore the potential neurological and genetic implications of these EEG findings in children.
Summary:
- A study of 2307 children identified evoked spikes in 2.99% of EEGs.
- Among children with febrile convulsions, 13 neurologically normal individuals exhibited evoked spikes, particularly with parietal epileptiform activity.
- These EEG features suggest a functional, possibly genetic, origin rather than an organic one.
Impact:
- Identifies a potential EEG biomarker (evoked spikes) associated with febrile convulsions in children.
- Highlights the need for longitudinal studies to assess epilepsy risk in children with both febrile convulsions and evoked spikes.
- Suggests that EEG findings may offer insights into epilepsy risk not apparent from clinical data alone.
Abstract:
In a population of 2307 children, 69 (2.99%) showed in the EEG high-voltage evoked potentials (evoked spikes) elicited by tapping on the feet or hands. Febrile convulsions were mentioned in 226 cases, and 13 of them showed the evoked spikes in the EEG and were otherwise neurologically and psychologically normal. Association between febrile convulsions and evoked spikes was observed, mainly when EEG showed also epileptiform activity of parietal localization. These EEG features are probably of functional rather than organic nature, and with possible genetic mechanisms involved. Longitudinal studies of children with febrile convulsions and evoked spikes in the EEG are necessary to verify a possible high risk of developing epilepsy not predicted on clinical data.