Automatic lateralization of temporal lobe epilepsy based on scalp EEG

Area of Science:

• Neuroscience
• Medical Signal Processing
• Epileptology

Background:

• Accurate localization of the epileptic seizure onset zone is crucial for effective treatment.
• Scalp electroencephalogram (EEG) provides a non-invasive method for monitoring brain activity.

Purpose of the Study:

• To determine the lateralization of the epileptic seizure onset zone.
• To evaluate the efficacy of scalp EEG signal processing for seizure localization.

Main Methods:

• A comprehensive method analyzing the evolution of nonlinear correlation coefficients between bipolar EEG channels (longitudinal montage).
• Nonlinear regression analysis was used to estimate correlation coefficients.
• Methodology involved segmentation, seizure onset determination, and lateralization steps.

Main Results:

• Mean nonlinear correlation values between EEG channels were significantly higher on the side of seizure onset.
• The developed method demonstrated high reproducibility.

Conclusions:

• The side of seizure onset was determined for 80-90% of studied seizures.
• Comparing nonlinear correlation coefficients between brain hemispheres effectively determines seizure onset side.