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Epilepsy is a chronic neurological disease marked by recurrent, unpredictable seizures. These seizures are caused by abnormal electrical discharges in the brain, leading to behavior, sensation, or consciousness alterations. They can also cause transient impairment of awareness, interfering with daily activities.
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Normative structural connectome constrains spreading transient brain activity in generalized epilepsy.

Jie Xia1,2, Siqi Yang3, Jiao Li1,2

  • 1The Clinical Hospital of Chengdu Brain Science Institute, School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, 611731, People's Republic of China.

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|May 2, 2025
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Summary

The brain's structural connections constrain abnormal activity spread in genetic generalized epilepsy with generalized tonic-clonic seizure (GGE-GTCS). White matter architecture and molecular factors predict these GGE-GTCS activity patterns.

Keywords:
Disease epicenterGeneralized epilepsyNetwork spreadingStructural connectomeTransient brain activity

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Area of Science:

  • Neuroscience
  • Epilepsy Research
  • Connectomics

Background:

  • Genetic generalized epilepsy (GGE) involves widespread abnormal neural activity.
  • Mechanisms of abnormal activity spread, particularly connectome-based, are poorly understood.
  • This study investigates how the structural connectome influences GGE with generalized tonic-clonic seizure (GGE-GTCS) activity propagation.

Purpose of the Study:

  • To explore the role of the normative structural connectome in constraining abnormal brain activity spread in GGE-GTCS.
  • To identify potential molecular underpinnings and disease epicenters of GGE-GTCS.

Main Methods:

  • Resting-state fMRI assessed abnormal activity patterns in GGE-GTCS patients and controls.
  • Diffusion-weighted imaging derived the normative structural connectome.
  • Structural neighborhood analysis, dominance analysis, and network-based diffusion modeling were employed.

Main Results:

  • Abnormal activity in GGE-GTCS was concentrated in temporal, cingulate, prefrontal, and parietal cortices.
  • Structurally connected neighbors significantly predicted regional activity abnormalities, confirming white matter constraints.
  • Molecular fingerprints and network modeling identified key predictors and potential disease epicenters.

Conclusions:

  • The structural connectome significantly shapes the spatial distribution of brain activity abnormalities in GGE-GTCS.
  • Findings advance understanding of network-level mechanisms in GGE-GTCS vulnerability and activity propagation.