A 4–90 Hz spectral background fit reduces beta channel rank agreement in 2.5 s windows from eight SEEG patients
We tested whether beta channel ranks retain agreement after a spectral background fit. We used all 22 repeated records from eight patients in OpenNeuro ds006519 version 1.0.0. The primary analysis used 24 matched record pairs and 2.5 s windows. The raw beta score was mean log power from 13 through 30 Hz. The contrast removed a fitted log-spectrum line from 4 through 90 Hz, with beta and 48–52 Hz bins excluded. Each patient had equal weight. Mean Spearman agreement was 0.838 for raw beta and 0.482 for contrast. The paired difference was -0.356. The patient bootstrap 95 percent interval was -0.436 to -0.278. All eight differences were negative. The exact sign-flip test gave p = 0.00781. Four fixed checks had the same direction. A proof and noise model show that the contrast rejects fixed nonzero channel voltage gain. This does not show that gain caused the patient result. It does not compare decoding or stimulation outcomes. The package includes exact event data, spectra, all scores, two figures, code, source hashes, and reproduction instructions. All 225 source files passed new hash checks. Fresh extraction reproduced all 176 event arrays exactly. A separate full run reproduced all 75 numerical analysis files. This is an exploratory extension on a reused cohort.
stereoelectroencephalography · SEEG · beta power · spectral background · channel rank agreement · Welch spectrum · brain-computer interface
References
5- usesBeta power ranks have higher agreement than beta network strength ranks between 3 s baselines in eight SEEG patients sci:sha256:dd8a1ee586c1a7276d197e8b391188542f3b8a9603e2240b0f58a49961c495b7
This study uses its 22 exact event files, selected source manifest, source metadata, matched physical-channel method, and filtered beta-power control. It adds a fixed spectral background contrast, a constant-gain proof, and a new paired rank endpoint on the same eight-patient cohort.
- usesBipolar SEEG pairs with a shared contact have higher mean absolute beta correlation than the nearest pairs with separate contacts in 21 patients sci:sha256:f9206e6467700c572ec5f73a7622ca0b4d27200ce928e5b1393ab3a0c47567c8
This study uses the original public-source retrieval and event extraction code and physical-contact parser, inherited through the rank parent. All 225 source files were checked again. Fresh extraction reproduced all 176 packaged event arrays exactly.
- usesdoi:10.18112/openneuro.ds006519.v1.0.0
Source of all tested SEEG signals and clinical metadata; the publication analyzes the exact 1.0.0 release.
- doi:10.1016/j.neuroimage.2026.121822
- doi:10.1038/s41593-020-00744-x
Cited by
4 publicationsPublic catalog entries on Sciscape.
- usesA three-band projection kept 57.1% mean SEEG accuracy under assumed gain and slope shifts in eight recordings
This related SEEG study tests removal of a spectral background in another dataset. It helps define the distinction between gain rejection and removal of a spectral axis. The present work tests task decoding with a three-band feature model.
- supportsA fixed spectral contrast had lower high-gamma pair rank agreement than absolute power across two SEEG records from 36 patients
The earlier study found lower beta rank agreement after a spectral contrast in eight SEEG patients. This study found lower high-gamma pair rank agreement in 36 patients from another dataset with a fixed flanking fit. It supports the direction in this new setting. It does not replicate the earlier fit. No code or data from that study were used.
- usesRemoving a 4–150 Hz fitted background reduced mean later-trial SEEG state accuracy by 7.1 percentage points in eight patients with eight fixed pairs each
Its lower beta rank agreement after a fitted background motivated the task-prediction question. The present endpoint is later-trial state accuracy in a different dataset. We do not use its voltage data or code.
- usesA fixed beta contrast test retained 61 percent of late post-stimulation beta power changes of at least 3 dB in 21 SEEG patients
Its fixed log-frequency background fit and constant-gain contrast idea define the method used here. This study uses integrated beta power and a new post-stimulation threshold endpoint. It does not use the prior rank endpoint or provide independent subjects.