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Benign childhood epilepsy with centro-temporal spikes: quantitative EEG and the Wechsler intelligence scale for

Gloria M A S Tedrus1, Lineu C Fonseca, Josiane M F Tonelotto

  • 1Department of Neurology, Pontifícia Universidade Católica de Campinas, SP, Brazil. gmtedrus@uol.com.br

Clinical EEG and Neuroscience
|August 26, 2006
PubMed

Insights

Children with benign childhood epilepsy with centro-temporal spikes (BECTS) show increased delta and theta brainwave activity. This electrical activity is linked to lower performance IQ scores in affected children.

Area of Science:

  • Neuroscience
  • Pediatric Neurology
  • Epileptology

Background:

  • Benign childhood epilepsy with centro-temporal spikes (BECTS) is a common focal epilepsy in children, typically resolving by age 18.
  • Emerging evidence suggests potential cognitive deficits in BECTS patients, including memory, attention, and learning impairments.
  • Quantitative electroencephalogram (qEEG) studies have indicated alterations in baseline brain electrical activity in children with BECTS.

Purpose of the Study:

  • To investigate absolute and relative power in delta, theta, alpha, and beta bands of qEEG in children with BECTS.
  • To examine the relationship between qEEG findings and IQ measurements (WISC-III) in these children.
  • To explore potential links between brain electrical activity maturation and cognitive performance in BECTS.

Main Methods:

  • A cohort of 26 children (8-11 years old) diagnosed with BECTS was compared to a gender- and age-matched control group.
  • Quantitative electroencephalogram (qEEG) was used to measure absolute and relative power in different frequency bands (delta, theta, alpha, beta).
  • Pearson's correlation test was employed to assess the relationship between qEEG power spectra and WISC-III IQ scores, specifically performance IQ.

Main Results:

  • Children with BECTS exhibited statistically significant increases in absolute delta and theta power across most electrodes compared to controls.
  • A negative correlation was found between absolute delta and theta power and performance IQ scores in the BECTS group at various electrode sites.
  • No significant differences were noted in alpha and beta band powers between the BECTS and control groups.

Conclusions:

  • Elevated delta and theta wave activity in qEEG may be a biomarker for maturational disturbances in children with BECTS.
  • These qEEG alterations are associated with impaired cognitive performance, particularly in performance-based IQ measures.
  • The findings suggest a neurodevelopmental component to cognitive challenges in BECTS, extending beyond seizure activity.

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