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Author Spotlight: Advancing Pediatric Epilepsy Surgery in Children Through Novel Biomarkers and Enhanced Localization
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Structural and functional abnormalities in first-episode drug-naïve pediatric idiopathic generalized epilepsy

Dingmei Deng1,2,3, Hui Sun4, Yuting Wang2,3

  • 1West China School of Public Health and West China Fourth Hospital, Sichuan University, No. 18, South Section 3, First Ring Road, Wuhou District, Chengdu 610041, China.

Cerebral Cortex (New York, N.Y. : 1991)
|February 5, 2024
PubMed

Insights

This study found structural and functional brain connectivity changes in children with new-onset idiopathic generalized epilepsy (IGE). These abnormalities, particularly within the default mode network (DMN), are key to understanding pediatric IGE.

Area of Science:

  • Neuroscience
  • Pediatric Neurology
  • Epileptology

Background:

  • Idiopathic generalized epilepsy (IGE) is a common epilepsy syndrome in children.
  • Understanding the underlying pathological mechanisms of pediatric IGE is crucial for effective treatment.
  • Previous research has explored structural and functional brain alterations in epilepsy, but pediatric IGE requires specific investigation.

Purpose of the Study:

  • To investigate brain structure and functional connectivity (static and dynamic) abnormalities in untreated, first-episode pediatric IGE.
  • To identify specific brain regions and networks affected in pediatric IGE.
  • To elucidate the pathological mechanisms contributing to pediatric IGE.

Main Methods:

  • Recruited 31 children with IGE and 31 healthy controls (HC).
  • Acquired structural magnetic resonance imaging (sMRI) data and performed voxel-based morphometry (VBM) for gray matter volume (GMV) analysis.
  • Conducted static functional connectivity (sFC) and dynamic functional connectivity (dFC) analyses using abnormal GMV regions as seeds.

Main Results:

  • The IGE group showed increased GMV in the left middle cingulate cortex (MCC) and right parahippocampus (ParaHipp) compared to HC.
  • dFC and sFC analyses revealed more extensive functional connectivity changes with MCC and ParaHipp as seeds, particularly in dFC.
  • Affected brain regions were predominantly located within the default mode network (DMN).

Conclusions:

  • This study identified microstructural and functional connectivity alterations in new-onset, untreated pediatric IGE.
  • The default mode network (DMN) plays a significant role in the development of pediatric IGE.
  • No significant associations were found between neuroimaging findings and clinical outcomes in this cohort.

Keywords:
functional connectivityfunctional magnetic resonance imagingidiopathic generalized epilepsyvoxel-based morphometry

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