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Intrinsic brain network stability during kainic acid-induced epileptogenesis.

Nastaran Jafari1, Lingna He2,3, Charbel Bou Khalil2

  • 1Department of Biomedical Engineering, University of North Texas, Denton, Texas, USA.

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Summary
This summary is machine-generated.

This study shows that brain networks are moderately stable in early epilepsy, but connectivity changes, especially in the frontal cortex and hippocampus, indicating altered brain function during epileptogenesis.

Keywords:
between networkepilepsyfMRInetwork stabilityresting statetest–retestwithin network

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Area of Science:

  • Neuroscience
  • Epilepsy Research
  • Functional Neuroimaging

Background:

  • Altered intrinsic brain networks are linked to epilepsy and network reorganization during the latent period.
  • The development and reliability of these networks in early epileptogenesis remain poorly understood.

Purpose of the Study:

  • To investigate the test-retest reliability of intrinsic brain networks in the early stage of epileptogenesis.
  • To identify changes in brain network stability and connectivity during the latent period of epilepsy.

Main Methods:

  • Utilized the rat intrahippocampal kainic acid model for mesial temporal lobe epilepsy.
  • Acquired resting-state functional magnetic resonance imaging (rs-fMRI) data over two weeks.
  • Employed group independent component analysis (GICA) and intraclass correlation coefficient (ICC) to assess network reliability.

Main Results:

  • Demonstrated good-to-excellent within-network stability in most intrinsic brain networks for both control and epilepsy groups.
  • Observed reduced stability in frontal cortex (FCN) and hippocampal networks (HPN) in the epilepsy group.
  • Found increased variation between networks in the epilepsy group compared to controls.

Conclusions:

  • Intrinsic brain networks exhibit moderate stability within a two-week latent period.
  • Functional connectivity increases during the latent period and persists across sessions.
  • Brain networks show altered between- and within-network connectome features in early epilepsy.