Evidence map›Paper›PMID 41652646›Full record

ArticleEpilepsia open2026

Scalp fast oscillations detected by high-density EEG as a noninvasive predictor of surgical outcome in temporal lobe epilepsy with hippocampal sclerosis.

Pongsakorn Kongsakorn, Suda Jirasakuldej, Peerasit Treesuthacheep, Totsapol Surawattanawong, Chusak Limotai

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Article in Epilepsia open, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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5 · Who and what money

Authors and funding

5 authors.

Pongsakorn KongsakornDivision of Neurology, Department of Medicine, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand.
Suda JirasakuldejDivision of Neurology, Department of Medicine, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand.
Peerasit TreesuthacheepDivision of Neurology, Department of Medicine, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand.
Totsapol SurawattanawongDivision of Neurology, Department of Medicine, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand.
Chusak LimotaiDivision of Neurology, Department of Medicine, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand.ORCID https://orcid.org/0000-0002-3136-9199

Funding

Ratchadapiseksompotch Fund RA59/100
6 · The paper itself

Abstract

objectiveTo evaluate whether scalp oscillatory patterns-particularly scalp fast oscillations (SFOs) (>30 Hz) detected using 256-channel high-density EEG (HD-EEG)-are associated with and can predict surgical outcomes in patients with drug-resistant temporal lobe epilepsy with hippocampal sclerosis (TLE-HS) undergoing anterior temporal lobectomy (ATL).

methodThis prospective cohort study included 47 patients with drug-resistant TLE-HS who underwent HD-EEG and subsequent ATL with at least 24 months of postoperative follow-up. A total of 70 averaged interictal epileptiform discharges (IEDs) were analyzed using time-frequency methods. Scalp oscillation frequencies across anterior temporal, posterior temporal, and extratemporal regions were calculated, and cluster analysis was performed to identify significant patterns. Scalp fast oscillations (SFOs; >30 Hz) were separately analyzed. Associations with surgical outcomes were assessed using generalized linear mixed models, and diagnostic performance was evaluated.

resultsA total of 70 averaged IEDs from 47 patients were analyzed. Patients with seizure recurrence exhibited higher median scalp oscillation frequencies across anterior temporal (34.26 Hz), posterior temporal (29.47 Hz), and extratemporal regions (25.25 Hz) compared to seizure-free patients (12.50, 7.56, and 9.17 Hz, respectively). Among 22 IEDs with SFOs (>30 Hz), cluster-based analysis identified a specific frequency pattern significantly associated with surgical outcome (p = 0.031). This SFO-based pattern independently predicted seizure recurrence (odds ratio = 12.60, 95% CI: 1.19-133.89, p = 0.036), with a sensitivity of 87.5%, specificity of 64.3%, and an area under the receiver operating characteristic curve of 0.759. SIGNIFICANCE: This study demonstrates that specific scalp oscillatory patterns, particularly SFOs detected via 256-channel HD-EEG, are predictive of surgical outcomes in TLE-HS. These findings suggest that scalp oscillation analysis may serve as a valuable, noninvasive biomarker in the presurgical evaluation of epilepsy and could aid in delineating the extent of the epileptogenic network. PLAIN LANGUAGE SUMMARY: In this study, we used advanced brainwave recordings (called high-density EEG) to examine electrical patterns in the brains of people with epilepsy. We found that certain fast brainwave signals were linked to whether surgery could stop seizures. These signals may help doctors better plan epilepsy surgery in the future.

Indexed as

Anterior Temporal LobectomyEpilepsy, Temporal LobeHippocampal SclerosisAdultBrain WavesElectroencephalographyFemaleFollow-Up StudiesHumansMaleProspective StudiesRecurrenceScalpTreatment OutcomeYoung Adulthigh‐density EEGhippocampal sclerosisscalp fast oscillationssurgical outcome predictiontemporal lobe epilepsy

Identifiers

PMID41652646
PMCPMC13052143

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