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Updated: Aug 19, 2026

Interictal High Frequency Oscillations Detected with Simultaneous Magnetoencephalography and Electroencephalography as Biomarker of Pediatric Epilepsy
10:22

Interictal High Frequency Oscillations Detected with Simultaneous Magnetoencephalography and Electroencephalography as Biomarker of Pediatric Epilepsy

Published on: December 6, 2016

Electroencephalographic and clinical features of typical absence seizures in children

C L Tseng1, M Y Lin, P J Wang

  • 1Department of Pediatrics, National Taiwan University Hospital, Taipei, R.O.C.

Zhonghua Minguo Xiao Er Ke Yi Xue Hui Za Zhi [Journal]. Zhonghua Minguo Xiao Er Ke Yi Xue Hui
|March 1, 1992
PubMed

Insights

This study analyzed 17 absence seizure cases in children, finding that hyperventilation reliably triggered seizures and characteristic EEG patterns. Most patients exhibited normal background EEG activity between seizures.

Area of Science:

  • Pediatric Neurology
  • Clinical Neurophysiology

Background:

  • Absence seizures are a common epilepsy syndrome in children.
  • Understanding their clinical and electroencephalographic (EEG) features is crucial for diagnosis and management.

Purpose of the Study:

  • To analyze the clinical and EEG characteristics of typical absence seizures in children.
  • To investigate the diagnostic utility of hyperventilation in these patients.

Main Methods:

  • Retrospective analysis of 17 pediatric patients with absence seizures.
  • Detailed clinical evaluation and comprehensive EEG examinations, including waking and sleep records.
  • Provocative testing with hyperventilation.

Main Results:

  • All 17 patients presented with typical absences and regular, bilaterally synchronous, symmetric 3 Hz spike-and-wave discharges on EEG.
  • Hyperventilation successfully induced clinical seizures and characteristic EEG findings in all cases.
  • Nine patients showed interictal focal spike discharges, and four had automatisms.

Conclusions:

  • Typical absence seizures in children are characterized by specific EEG patterns that are consistently provoked by hyperventilation.
  • EEG, particularly with hyperventilation, remains a vital tool for diagnosing absence seizures in pediatric neurology.
  • Interictal focal spikes may be present in a subset of children with absence seizures.

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