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q-bio.NC · Neurons and Cognition

Covariance between SEEG shafts at 1–80 Hz had positive repeat agreement after shaft mean removal in all 36 patients

We tested repeat agreement after shaft mean removal in public SEEG data. We used two interictal files from each of 36 patients in OpenNeuro ds004100 version 1.1.3. The mean signed cosine of retained 1–80 Hz covariance between shafts was 0.630. The 95% patient bootstrap interval was 0.577–0.679. All 36 patient means were positive. The observed score exceeded all 999 sampled contact-order controls in 35 patients. Fixed checks of frequency band, shaft grouping, and contact scaling also gave positive means. The removed component had higher mean agreement after common average reference. The study reuses a prior cohort and tests short excerpts. It does not identify a neural source. An unequal-gain artifact can survive shaft mean removal and repeat perfectly. The package preserves covariance inputs, code, all results, source metadata, public range recipes, and verification receipts.

stereoelectroencephalography · SEEG · intracranial EEG · covariance · repeat agreement · shaft mean removal · reference · signal processing

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References

6
  1. usesIn 36 patients with fixed SEEG contrasts, mean change in estimated canonical correlation spectra was larger between files than between adjacent blocks at 1–80 Hz sci:sha256:1217c177ec55b99e3867daa6135687900230630b32c8a790c700777fcc5adf29

    Its covariance inputs, signal example, and raw reconstruction code were carried through the direct input publication. We retained their source notices and checked their values with fresh public bytes.

  2. usesEdges that share a contact are more common among the strongest 5 percent of 1–80 Hz bipolar SEEG correlations in 36 epilepsy patients sci:sha256:7dc3370736cdefb57323429971522e882b644b700faccfda51b916b3d865f58f

    Its cohort selection, contact rules, filter settings, pinned EDF range recipe, and source hashes define the input scope. These were carried through the direct input publication.

  3. usesShaft mean subtraction removed a mean of 79.5% of 1–80 Hz cross-shaft covariance energy after common average reference in 36 SEEG patients sci:sha256:ed22b5bdeeef7822656b56235c79374a1c82ada36c84c69ff3f1abe604b1484d

    We copied its 72 covariance inputs, signal excerpt, source metadata, range recipe, licenses, and raw reconstruction code. Its endpoint measured removed covariance energy. We measured repeat agreement of the retained pattern. This is a secondary analysis of the same 36 patients.

  4. usesTwo bases of the same SEEG contrast space gave different 1–80 Hz correlation participation ratios in 36 patients sci:sha256:901bade82e1972a491fb8b27d87ddf5ae157f439c20fb612d6d24768419473f2

    Its covariance archives are the source of the inputs carried through the direct input publication. We use the same contrast projection for a different endpoint: signed agreement between two files.

  5. usesdoi:10.18112/openneuro.ds004100.v1.1.3

    Analyzed public SEEG files from OpenNeuro ds004100, version 1.1.3; the pinned metadata records a CC0 license.

  6. doi:10.1093/braincomms%2Ffcae165

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