Evaluation of EEG Foundation Models for Event-Based Burst-Suppression Detection in ICU

• URL: http://arxiv.org/abs/2606.20074v1
• Date: Thu, 18 Jun 2026 10:49:36 GMT
• Title: Evaluation of EEG Foundation Models for Event-Based Burst-Suppression Detection in ICU
• Abstract summary: Burst suppression (BS) is used to monitor sedation depth and brain activity in critically ill patients.<n>EEG Foundation Models (FMs) have shown promise across several downstream EEG applications.<n>We present the first study to evaluate EEG FMs for burst detection in reduced-montage ICU EEG.
• Score: 12.022301436686435
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Burst suppression (BS) is a clinically relevant electroencephalographic (EEG) pattern used to monitor sedation depth and brain activity in critically ill patients, particularly during induced coma in Intensive Care Units (ICUs). Automatic burst detection remains challenging because BS patterns vary substantially between patients and annotated datasets are scarce. Recently, EEG Foundation Models (FMs) have shown promise across several downstream EEG applications, but their usefulness for BS detection remains unexplored. We present the first study to evaluate EEG FMs for burst detection in reduced-montage ICU EEG without patient-specific calibration. We compare REVE-base, LUNA-large and LuMamba-Tiny with an adaptive thresholding baseline and a task-specific EEGNet baseline. Additionally, we complement conventional EEG window-based classification with event-based burst detection evaluation. This helps assessing clinically whether burst episodes are correctly detected, reducing the impact of expected annotation variability. The best model, REVE-base, achieved the highest event-based F1-score ($0.868 \pm 0.167$) and reduced burst-per-minute error by 52.1% and 36.2% compared to EEGNet and adaptive thresholding respectively, supporting FMs for scalable EEG monitoring in ICU. Ablation experiments showed that full fine-tuning was the most effective adaptation strategy with respect to frozen-backbone training, two-step fine-tuning, and LoRA-based adaptation, improving event-based F1-score over frozen-backbone training by up to $+0.102$ for LUNA-large. With reduced labeled datasets, pretrained REVE-base outperformed random initialization by $+0.723$ event-based F1 points at 25% of the cohort, demonstrating the benefit of pretraining FM representations when adapted to burst detection with limited labeled data.

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