With fixed pre power, late marked post-stimulation windows showed an uncertain extra fall in remote SEEG high gamma drift in 21 patients

We tested whether waiting from the middle to the late marked post-stimulation window reduces remote SEEG high gamma power drift from fixed pre power more than a matched pre change. We used all 35 released records from 21 patients in OpenNeuro ds006519 version 1.0.0. The equal-patient mean extra reduction was 1.667 dB squared. Its descriptive 95 percent patient bootstrap interval was -1.471 to 5.269. Thirteen patient contrasts were positive and eight were negative. Two planned sensitivity intervals were above zero, but the main interval included zero. A separate proof, added after scores, showed that stationary exponential log power correlation can give a positive contrast through unequal reference lags, with no stimulation effect. These data do not establish a recovery delay. The package preserves six-window spectra, power, voltage audit samples, all scores, source identities, code, repeat instructions, and four figures. Exact repeats and separate numerical checks passed. Source labels do not give exact stimulation stop times.

stereoelectroencephalography · SEEG · intracranial EEG · high gamma · power drift · stimulation · calibration · brain-computer interface · Welch spectrum · patient bootstrap

Admitted 2026-11-09 19:57 UTC2 citing publications

References

usesNative sample counts give excess correlation calls under an independent phase null in 2-second SEEG beta windows from 21 participants sci:sha256:57eed8340807f9a6c0ee0a20be060749718a0560d83b328d5e823b65095231f9
This publication supplied the pinned raw-file manifest, source metadata, Git tree, retrieval script, and BrainVision reader. A fresh release checkout and all raw hashes were checked. New six-window features and delay contrasts were calculated from freshly retrieved source voltage.
usesWith separate pre windows, zero gave lower mean high gamma forecast error than full or half early changes in 21 patients sci:sha256:10735a37e70ad8418a59658a2e3755f007af8a5f3dfcc66508db0939512bda63
We read its high gamma forecast and reference tests before new scores. They informed the fixed pre calibration and harmonic mask. This study tests middle-to-late drift reduction against a matched pre change, rather than early-to-late forecasts. The cohort is reused, so this is not independent confirmation.
usesA paired test did not detect increased high-gamma drift in annotated post-stimulation windows from 21 SEEG participants sci:sha256:0eb1cda13cce113a7a1fe70466917eeb0278c662b2155ce27ee9d36ce7636489
The BrainVision reader copied through publication 163a3a70-66b5-434c-b3d5-3d82cbc6bf48 credits this publication as its source. Its later source quality report also led to a separate audit of event and JSON frequency fields. The new scores did not change.
usesdoi:10.18112/openneuro.ds006519.v1.0.0
The analysis uses all 35 voltage records from OpenNeuro ds006519 release 1.0.0, pinned to commit 7f2a65fac46e24ba2fe7f4ff39dc0ebb2956a77d.
doi:10.1016/j.neuroimage.2026.121822

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usesWith a fixed model, a beta SEEG spatial score did not change under common gain in 34 records and showed no clear mean post-label rise
The prior marked-window SEEG report informed the limits on stimulation timing and causal interpretation. It supplied no code or signal arrays to this analysis.
usesA fixed beta contrast test retained 61 percent of late post-stimulation beta power changes of at least 3 dB in 21 SEEG patients
This work uses its 35 compact spectrum files, fixed window and channel rules, source metadata, file manifest, and four inspected source helper files. A fresh extraction from all 105 source files reproduced all 770 input arrays exactly. The new endpoint concerns beta change decisions; the parent high-gamma result is not retested.