Related Experiment Video
Updated: Dec 23, 2025
12:09
Network Analysis of the Default Mode Network Using Functional Connectivity MRI in Temporal Lobe Epilepsy
Published on: August 5, 2014
18.4K
Heritability of alpha and sensorimotor network changes in temporal lobe epilepsy
Siti N Yaakub1,2, Chayanin Tangwiriyasakul1, Eugenio Abela1,3
1Department of Basic & Clinical Neuroscience, Institute of Psychiatry, King's College London, Psychology & Neuroscience, London, UK.
Annals of Clinical and Translational Neurology
|April 26, 2020
Summary
Electroencephalography (EEG) alpha band abnormalities, including reduced peak alpha frequency (PAF), are present in mesial temporal lobe epilepsy (mTLE) patients and their asymptomatic relatives, suggesting a genetic link.
Area of Science:
- Neuroscience
- Epileptology
- Genetics
Background:
- Alpha band electroencephalography (EEG) features distinguish epilepsy patients from healthy individuals.
- Mesial temporal lobe epilepsy (mTLE) is a common epilepsy syndrome with complex underlying mechanisms.
Purpose of the Study:
- Confirm EEG alpha band differences in mTLE patients.
- Investigate differences in alpha rhythm-related brain networks using simultaneous EEG-fMRI.
- Determine if alpha abnormalities represent an inherited endophenotype in asymptomatic relatives.
Main Methods:
- Acquired simultaneous EEG and fMRI in 24 mTLE patients, 23 asymptomatic first-degree relatives, and 32 healthy controls.
- Compared peak alpha frequency (PAF) and power between groups.
- Identified and compared alpha oscillation-associated brain networks.
Main Results:
- mTLE patients exhibited significantly reduced PAF across parietal and occipital electrodes.
- Asymptomatic relatives also showed significantly reduced PAF in most parietal and occipital regions.
- Both patients and relatives displayed altered sensorimotor network activation patterns related to alpha oscillations compared to controls.
Conclusions:
- Reduced PAF and altered brain networks associated with alpha oscillations may be inherited endophenotypes in mTLE.
- These findings suggest genetic factors contribute to mTLE pathophysiology.
- Further research is warranted to explore these alpha abnormalities as mechanistic contributors to mTLE.
