EEG Domain

CHB-MIT Dataset

The CHB-MIT Scalp EEG Database (PhysioNet) contains continuous EEG recordings from 23 pediatric patients with intractable epilepsy. Recordings use the international 10-20 system at 256 Hz sampling rate.

Our experiments use a 7-patient subset for hardware validation: chb01, chb03, chb05, chb07, chb11, chb14, chb21. Note: chb07 (not chb08) — selected for sufficient seizure events, consistent recording montage, and coverage of both polarity populations.

Full 22-patient simulation results inform the calibration tier analysis. Leave-One-Subject-Out (LOSO) cross-validation throughout — no within-patient training.

Hardware Subset Rationale

• chb01: Strong standard polarity at CH8@1.95s (AUC 0.686), weakly polar across configs
• chb03: Consistent inverted polarity across all configurations — strongly polar
• chb05: Standard at CH8@1.95s, inverted at CH8@20s — configuration-dependent
• chb07: Standard at CH8@1.95s and CH12, inverted at CH8@20s
• chb11: Inverted at CH8@1.95s and CH8@20s, chance at CH12 — partial consistency
• chb14: Standard at CH8@1.95s and CH12, inverted at CH8@20s
• chb21: Consistent inverted polarity across all configurations — strongly polar

Mark IV — Future Data

The Mark IV headset (18-channel, OpenBCI Cyton + Daisy) is built and awaiting first recording. Mark IV data will provide a second independent dataset beyond CHB-MIT, with controlled recording conditions and known electrode placement.

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