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Updated: Jun 28, 2026
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Network Analysis of the Default Mode Network Using Functional Connectivity MRI in Temporal Lobe Epilepsy
Published on: August 5, 2014
18.0K
Characterizing white matter connectome abnormalities in patients with temporal lobe epilepsy using threshold-free
Daniel Y Chu1,2, Theodore P Imhoff-Smith1, Veena A Nair1
1Department of Radiology, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA.
Brain and Behavior
|August 5, 2024
Summary
Temporal lobe epilepsy (TLE) is linked to widespread white matter connectome changes. These brain network abnormalities correlate with cognitive impairment and a history of focal-to-bilateral tonic-clonic (FBTC) seizures in TLE patients.
Area of Science:
- Neuroimaging
- Epilepsy Research
- Connectomics
Background:
- Temporal lobe epilepsy (TLE) involves network disruptions, including hyperexcitability and neural plasticity, but these associations require further characterization.
- Understanding TLE's impact on brain networks is crucial for developing targeted therapies.
Purpose of the Study:
- To characterize whole-brain white matter connectome abnormalities in TLE patients compared to healthy controls (HCs).
- To assess the relationship between aberrant white matter connections and cognitive impairment.
- To investigate the association between white matter abnormalities and a history of focal-to-bilateral tonic-clonic (FBTC) seizures.
Main Methods:
- Multi-shell connectome MRI data from 142 subjects (92 TLE, 50 HCs) were analyzed.
- Structural connectivity matrices (SCMs) were derived and harmonized using ComBat.
- Network-based statistics and graph theory measures were employed to analyze white matter integrity and connectivity.
Main Results:
- TLE patients exhibited significantly decreased white matter tract cross-sectional area (CSA) compared to HCs, indicating reduced integrity and connectivity.
- Abnormalities in the white matter connectome were more pronounced in TLE patients with cognitive impairment.
- A trend towards decreased CSA was observed in patients with a history of FBTC seizures.
Conclusions:
- Widespread aberrant white matter connectome changes are characteristic of TLE.
- These changes are associated with seizure history and cognitive impairment in TLE.
- Findings provide a foundation for novel biomarker development and further understanding of TLE's impact on brain plasticity.
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