Electroencephalography in mesial temporal lobe epilepsy: a review

Area of Science:

• Neurology
• Neurophysiology

Background:

• Electroencephalography (EEG) is vital for epilepsy diagnosis, classification, and treatment guidance.
• Temporal Lobe Epilepsy (TLE) often requires surgical intervention due to medical refractoriness.
• Accurate seizure focus localization is critical for successful epilepsy surgery.

Purpose of the Study:

• To review the role of EEG in epilepsy diagnosis and management.
• To discuss EEG findings in mesial temporal lobe epilepsy (MTLE) using scalp and intracranial recordings.
• To evaluate EEG's utility in predicting seizure recurrence post-treatment.

Main Methods:

• Review of EEG applications in epilepsy diagnosis and classification.
• Analysis of scalp and intracranial EEG findings in mesial temporal lobe epilepsy (MTLE).
• Discussion of automated seizure detection and mathematical models for localization.

Main Results:

• EEG provides critical data for predicting antiseizure drug response and identifying surgically remediable epilepsy.
• Invasive EEG is essential for precise seizure focus localization in TLE when scalp EEG is insufficient.
• EEG demonstrates significant sensitivity, specificity, and predictive value for seizure recurrence.

Conclusions:

• EEG is indispensable for comprehensive epilepsy evaluation, particularly in TLE.
• Intracranial EEG recordings significantly enhance presurgical localization accuracy for TLE.
• EEG parameters are valuable for predicting outcomes after medical and surgical interventions for epilepsy.