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q-bio.NC · Neurons and Cognition

A fixed spectral background adjustment changed the sign of beta power changes in SEEG from 21 patients

We tested public SEEG from 21 patients with epilepsy in OpenNeuro ds006519 version 1.0.0. We used 35 records and 1750 channel records in marked three-second periods before and after negative motor stimulation. A fixed log-linear fit used 5–7, 35–40, and 60–80 Hz to predict background beta power. The measured and adjusted beta changes had opposite signs in 28.8% of weighted channel records (95% patient interval 25.7% to 31.8%). Both magnitudes were at least 1 dB in 7.2%. The equal-patient mean adjusted change was -0.189 dB (95% interval -0.493 to +0.110; exact sign-flip p=0.245). The primary test did not detect a mean change under patient independence and null sign symmetry. One quadratic sensitivity interval excluded zero without multiple-test adjustment. This is a measurement check in reused clinical data. It does not prove a beta oscillation or a causal motor effect. The package preserves paired epochs, source pins, code, results, and checks.

stereoelectroencephalography · beta power · spectral background · negative motor response · intracranial EEG · epilepsy

Admitted 2 citing publications

References

6
  1. usesAbsolute and relative beta changes had opposite signs at a 39% weighted rate in three-second SEEG pairs from 21 patients sci:sha256:9e8bc59d4ea2fcba9e4592490535fd2ec4e35fc5f823a17b045e5a0d0c743ecb

    This publication supplied paired epochs, source metadata, pinned retrieval records, and extraction code. We checked the copied inputs and rebuilt all 65 epoch files from original signals.

  2. usesA fixed local trend test did not detect a mean beta residual change in 21 SEEG patients under patient independence and sign symmetry sci:sha256:e706b4d2630a345f6c6ea83efcd92c9a2b1053e23d63875843161790af52ba5a

    We used this prior local spectrum result to explain the scope of the broader background test. These reports use the same patients. The present result is not an independent clinical cohort.

  3. usesUnder patient independence and sign symmetry, the three-second SEEG test did not detect a mean beta power contrast between stimulated and other shafts in 19 patients sci:sha256:d17ca5709c7f227838b3047abaf695a8409ce220bf2f347b1da350ea2be8f247

    This publication supplied the original extraction code that we reused through the normalization report. We retained its source channel and shaft definitions.

  4. usesdoi:10.18112/openneuro.ds006519.v1.0.0

    Analyzed the pinned OpenNeuro ds006519 release, version 1.0.0; the source files and release identities are documented in the README and provenance files.

  5. doi:10.1016/j.neuroimage.2026.121822
  6. doi:10.1002/hbm.25749

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