A five-pulse test did not establish a cross-shaft noise covariance change after stimulation in eight SEEG patients
A reader that works after electrical stimulation can use a noise model from before a pulse. We tested whether slow voltage noise covariance between different electrode shafts changed in public STReEF SEEG data. The sample has eight patients, 96 inherited conditions, and five later pulses per condition. We provide a pulse-difference estimator and a conditional expectation proof. Products from disjoint pulse pairs estimate a squared covariance change under independent pulses with stable means and second moments. The primary mean score was 0.22247. Its descriptive 95 percent patient bootstrap interval was -0.01990 to 0.67574. The two-sided patient sign-change probability was 0.53125 and requires a symmetric null. The test did not establish a cross-shaft covariance change. A secondary after/before variance ratio was 1.19267. One patient had a much larger primary score than the others. The package includes all tested coefficients, code, proof, figures, source versions and hashes, and reproduction instructions. All 960 fresh raw ranges and 147 fresh metadata files matched source hashes. An independent implementation and a separate replay passed. Clinical selection, five pulses, serial dependence, response drift, and residual artifact limit the result. This study does not establish an interface gain or a neural cause.
stereo-EEG · SEEG · electrical stimulation · trial noise · covariance change · pulse differences · brain-computer interfaces · signal processing
References
4- usesFixed donor variance weights raised mean SEEG pulse AUC with 16 temporal modes after five fit pulses in eight people from a separate cohort sci:sha256:eb64e4c0897c7de27a4559ea3c4fda4df040535bc6dffae1b4b414a65db978bf
Reuses the fixed STReEF SEEG sample, version-pinned source maps, voltage coefficient archive, and licensed retrieval and cosine-transform code. This study rebuilds the selected raw ranges and tests cross-shaft trial noise covariance change with a disjoint-pulse estimator.
- usesdoi:10.18112/openneuro.ds005448.v1.0.0
Uses STReEF, OpenNeuro ds005448 version 1.0.0, for the eight SEEG patients.
- doi:10.1016/j.ynirp.2025.100274
- doi:10.1007/s12021-022-09567-6
Cited by
4 publicationsPublic catalog entries on Sciscape.
- usesSlow SEEG energy before a pulse had a mean rank correlation of 0.164 with later template error in eight STReEF patients
We used the fixed sample, cosine transform, source receipts, and retrieval code. We rebuilt all 960 raw ranges. We then tested before energy against later template error.
- usesFive test pulses did not establish a 4–30 Hz SEEG covariance change between shafts in eight patients under independent pulses with stable means and second moments
We adapt its disjoint pulse pair estimator and conditional expectation proof to a different public cohort and Fourier band coordinates. We do not claim a new estimator or combine the cohort effects.
- usesA rule that used half of one SEEG monitor's gain change did not establish pulse tracking after contact order reversal in eight patients
Used the fixed 96-condition sample, contact maps, source receipts, archived coefficients, and five unchanged source modules. Retrieved all pinned voltage ranges again before the new monitor analysis.
- usesA four-mode background model had a mean 0.62% increase in 20 to 480 ms SEEG template error after contact order reversal in eight STReEF patients at ridge strength 0.1
The direct input inherited its fixed sample and cosine-coordinate helper through this source. We retained the cosine helper and its license chain; we did not use its response model.