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Related Experiment Video

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Network Analysis of the Default Mode Network Using Functional Connectivity MRI in Temporal Lobe Epilepsy
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Disparities in Connectivity Profiles Between Structural and Functional Networks in Patients With Temporal Lobe

Yu Zhou1, Liangchao Du1, Fangfang Xie2

  • 1Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, Hunan Province, China.

Brain and Behavior
|September 27, 2025
PubMed
Summary

Temporal lobe epilepsy (TLE) is a network disorder. This study reveals differing impacts of seizure duration on structural connectivity (SC) and functional connectivity (FC), suggesting network reorganization in TLE patients.

Keywords:
duration of epilepsyfunctional connectivitystructural connectivitytemporal lobe epilepsy

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Area of Science:

  • Neuroscience
  • Epilepsy Research
  • Network Science

Background:

  • Temporal lobe epilepsy (TLE) is a common neurological disorder.
  • TLE is increasingly understood as a network disorder, but distinctions between connectivity types are understudied.
  • Structural connectivity (SC) reflects cumulative structural changes, while functional connectivity (FC) indicates short-term neural cooperation.

Purpose of the Study:

  • To investigate the spectrum of structural and functional network connectivity in TLE patients.
  • To examine the influence of seizure duration on both SC and FC.
  • To explore potential network reorganization patterns in TLE.

Main Methods:

  • Construction of comprehensive structural and functional network connectivity maps in TLE patients.
  • Analysis of the modulatory effects of seizure duration on connectivity metrics.
  • Comparison of SC and FC patterns, particularly in relation to lesion proximity and the default mode network.

Main Results:

  • Observed pervasive reductions in both SC and FC, with inconsistent coupling patterns.
  • Increased seizure duration correlated with decreased SC, especially near lesions.
  • Prolonged seizure duration led to a general FC decline but increased abnormal FC within the midline default mode network.

Conclusions:

  • Structural and functional connectivity exhibit heterogeneous and inconsistent patterns in TLE.
  • Seizure duration differentially impacts SC and FC, suggesting distinct evolutionary trajectories.
  • Findings indicate potential network reorganization in TLE, with seizure duration as a key modulating factor.