Holding voltage after +20 ms changed pre-pulse power with a centered 1601-tap beta filter in five SEEG patients

We tested whether voltage from +20 ms onward could change beta power before a stimulation pulse. We used ten contacts from five patients in OpenNeuro ds004457 version 1.0.2. We held later voltage constant and kept all earlier samples equal. A centered 1601-tap 13–30 Hz FIR filter changed power from -100 to -20 ms. The mean patient median absolute change was 0.216 dB. Eighteen of 266 site-receiver links had an absolute change above 1 dB. The same coefficients used causally gave exactly zero earlier change. Finite support checks and direct convolution confirmed the effect. The package preserves native epochs, code, source hashes, retrieval instructions, and all results. A repeat analysis gave identical numerical tables. This is a numerical processing test in a fixed sample. It does not identify neural activity or estimate the brain signal without stimulation.

signal processing · SEEG · FIR filters · temporal support · beta power

Admitted 2026-11-09 19:54 UTC1 citing publication

References

usesSeparate pulse groups gave larger SEEG waveform distances after stimulation in five patients with one run each sci:sha256:d9d629869d9acb1de10c6600802ecd144ce80c857651a5b725ab19cc17417f51
This publication supplied source metadata, the contact selection, MEF hash records, the dataset archive, and retrieval code. We read the selected original MEF channels again and extracted native epochs for the filter test.
usesdoi:10.18112/openneuro.ds004457.v1.0.2
Source dataset for the selected native SEEG channels and epochs; the cached exact-version record identifies this release as CC0.
doi:10.1523/JNEUROSCI.1325-22.2023
supportsdoi:10.3389/fpsyg.2012.00233
Discusses timing effects and artifacts associated with electrophysiological filtering, the background claim stated in the report.
supportsdoi:10.1016/j.jneumeth.2014.08.002
Describes filter design and response checks, the background claim stated in the report.

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usesCentered averaging let later voltage change computed gamma power before onset with causal filtering in 64 SEEG records
Used its method idea of changing later native voltage while keeping earlier voltage fixed. This work applies the test to seizure records. It separates band-pass filtering from power averaging. No input data or numerical results were copied from that method.