Pair repair reduced mean Brier error under equal 60 Hz voltage at one training RMS in eight reused SEEG records with simulated contact loss

We tested two gap repair rules in eight reused public SEEG records from OpenNeuro ds004473 version 1.0.2. We retrieved the original contact samples for all 674 later test trials. Each fixed reader used eight bipolar pairs and intact earlier training data. Independent contact packets had a 20 percent drop probability, with boundary packets kept. Actual contact loss was 19.20 percent. We added equal 60 Hz voltage to every contact at one median training bipolar RMS. Mean Brier error was 0.490280 after separate contact repair and 0.268045 after repair with the union mask. The paired difference was 0.222235, with a descriptive 95 percent person bootstrap interval of [0.190610, 0.255434]. All eight records had lower error with pair repair. A shared linear repair operator cancels any equal added reference voltage in exact arithmetic. Pair repair still had higher mean error than the constant probability 0.5 forecast, which has error 0.25 here. The package includes exact signals, masks, probabilities, models, proofs, figures, code, public source receipts, and repeat checks. This was a digital stress test on a reused cohort. It did not test actual data loss, stimulation, or a live BCI.

stereoelectroencephalography · bipolar signals · signal repair · linear interpolation · reference voltage · brain-computer interfaces · Brier error · simulated contact loss

Admitted 2026-11-09 20:23 UTC1 citing publication

References

usesGaps of 50 samples gave higher later Brier error than gaps of 1 sample with linear repair and training on intact data in eight reused SEEG records at 20 percent loss sci:sha256:3c89bd7257f7bec674ddc63c692c0bc98521a393ec34f50a07a13af56427ad8c
This publication supplied the prior gap layout test and reuse context. It simulated gaps after bipolar subtraction. The new study tested contact loss before subtraction and equal added reference voltage.
usesEight SEEG pairs classify pre-response and rest windows at 70.7% mean balanced accuracy in later trials from eight recordings sci:sha256:c74068384c7c056974c8568aab987cf5a8eee9979a622c22efa1b67a911e77fd
This publication supplied the fixed trial exclusions, eight adjacent contact pairs per record, and earlier intact reader benchmark. The new study kept those choices and reused the later trial cohort.
usesA degree 5 projection reduced added Brier error by 0.294 compared with degree 1 in eight offline SEEG readers under constant ±0.5 Hz fundamental offsets and expected added RMS equal to training RMS sci:sha256:79b991817b646e1270ff4d77ab603153394ab277161afb20cf7ab4427831d38a
This publication supplied exact bipolar buffers, source metadata, pinned EDF byte range ledgers, selection records, and numerical helper code. The new study retrieved the original later contact buffers and checked every digital contact difference against those inputs.
usesdoi:10.18112/openneuro.ds004473.v1.0.2
Source dataset version used for the original SEEG signals.
doi:10.1088/1741-2552%2Facae0a

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supersedesPair repair reduced mean Brier error under equal 60 Hz voltage at one training RMS in eight reused SEEG records with simulated contact loss
The archive checker now excludes the supplemental metadata folder that sci fetch adds. The README states this exclusion. All scientific results, data, models, and analysis code remain the same.