Offline 4–8 Hz Fourier phase moved backward in SEEG baselines from all 21 tested patients
We tested whether the phase of a 4–8 Hz Fourier target always moves forward in public SEEG data. We used four-second baselines from 35 recordings in 21 patients. All 1,754 valid channel occurrences entered the analysis. With equal patient weight, phase rate was negative at 1.07% of scored times and outside 4–8 Hz at 15.52%. Every patient had a negative rate at some scored times. A Taylor bound accepted 68.72% of targets for a rate strictly within 4–8 Hz across ±10 ms. Its proof assumes exact, fixed Fourier coefficients. Numerical and grid checks passed. All 105 raw source files passed their byte-hash checks, and a fresh rebuild reproduced every compact input array exactly. The package includes a proof, code, point scores, four figures, provenance, and reproduction commands. The target uses the full epoch and is offline. This study tests no live controller, stimulation response, or clinical benefit. The patient cohort is shared with earlier sci studies.
stereoelectroencephalography · phase rate · Fourier analysis · instantaneous frequency · interval bound · brain-computer interface
References
7- usesAdding adjacent bipolar signals changed offline 4–8 Hz phase targets in 4 s SEEG baselines from 21 patients with fixed contact signs sci:sha256:2c34d102f2f1a73ae4b7672579c48d3015c3114054e1155e4b39dd5356188a16
This publication first supplied the four-second compact inputs and extraction definitions inherited through the direct input publication. The cohort is shared. Its contact-triple phase scores do not enter this study.
- usesNative sample counts give excess correlation calls under an independent phase null in 2-second SEEG beta windows from 21 participants sci:sha256:57eed8340807f9a6c0ee0a20be060749718a0560d83b328d5e823b65095231f9
The reused retrieval program and BrainVision reader retain attribution to this publication through the source package. Its correlation results do not enter the current analysis.
- usesA Fourier rule certified 65.5% of offline SEEG theta targets within 45 degrees for timing error up to 10 ms in 21 patients sci:sha256:33d9e527ddd5ed1477ab3ac9a37160fff2f237a5e23ee795339f00c4329889d3
This publication supplied the compact theta inputs, pinned public source manifest, metadata, and four extraction files. We used no previous phase error scores. A fresh public source rebuild reproduced every input array exactly.
- usesA paired test did not detect increased high-gamma drift in annotated post-stimulation windows from 21 SEEG participants sci:sha256:0eb1cda13cce113a7a1fe70466917eeb0278c662b2155ce27ee9d36ce7636489
The reused BrainVision header reader cites this earlier source. Its post-stimulation scores do not enter this baseline phase rate audit.
- usesdoi:10.18112/openneuro.ds006519.v1.0.0
The analysis used OpenNeuro ds006519 version 1.0.0; the pinned raw files and source metadata are identified by saved hashes and source URLs.
- doi:10.1250/ast.27.163
- doi:10.1038/s41467-025-59417-7
Cited by
2 publicationsPublic catalog entries on Sciscape.
- usesEndpoint checks missed interior phase errors above 45 degrees in 30 to 70 ms delay tests with a 2 s offline theta filter in 36 SEEG patients
Its evidence about backward phase motion gives context for phase path checks. Its target and dataset differ. We imported no data, scores, or code from that work.
- usesA one-second shift of a three-second window changed 4.56% of offline 4 to 8 Hz Fourier phase labels by more than 45 degrees in 21 SEEG patients
We used its retrieval manifest, pinned source metadata, BrainVision reader, retrieval code, and channel selection logic. We downloaded the raw files and made new shifted-window coefficients. The rebuilt four-second coefficients and channel selections matched its archived inputs. Its phase-rate scores were not analysis inputs.