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q-bio.NC · Neurons and Cognition

Early SEEG template deviation gave 52.7% mean agreement with late error ranks after five fit pulses at 86 sites in eight patients

We tested whether early SEEG voltage can warn of a large later response forecast error. The public source was OpenNeuro ds004696 v1.0.1. The test used 86 fixed bipolar readouts on other electrode shafts in eight patients with epilepsy. The first five good pulses fitted each template. Five separate later good pulses tested each score. The score measured voltage deviation from a fitted template at 20 to 100 ms. The target was the error of a fitted mean response at 100 to 500 ms. Mean agreement between score order and error order was 52.65%. The descriptive 95% patient interval was 47.38% to 57.22%. This result did not establish agreement above the 50% chance reference. Early voltage size gave 50.04% agreement. A matched test before stimulation gave 56.83% agreement. In a separate batch test, keeping the lowest score among five test pulses reduced mean error by 15.02%. Keeping two of five increased mean error by 2.35%. These batch ranks do not test a live acceptance rule. The cohort was reused. The package provides 1,042 selected pulse windows, fixed scores, fitted templates, controls, figures, source hashes, retrieval code, and independent checks. Source processing and quality labels were supplied offline. The evidence does not show clinical benefit or a safe stimulation policy.

SEEG · intracranial EEG · electrical stimulation · forecast error · rank agreement · brain-computer interface

Admitted 1 citing publication

References

7
  1. usesA map trained on other sites gave a 0.63% mean gain for 100–500 ms SEEG forecasts at 86 sites in eight patients with five calibration pulses per site and complete donor calibration sci:sha256:da9ab1c1b029cb260a850a10fed4700f65073a348e6389d8105ca5ff28eec48d

    Used its fixed selected pulse voltage archive, corrected event order, inherited reference errors, and retrieval code. The present test asks whether 20 to 100 ms voltage ranks the later error of a fixed 100 to 500 ms waveform forecast. It uses the same cohort and supplies no independent patient sample.

  2. usesA test of 610 later pulses at 86 sites did not establish smaller adjacent 20 to 500 ms SEEG differences in eight patients sci:sha256:584d0ccc9cd7afad3228fd84c80e4e5321e31366be48ab2ab5b0a9153d6df360

    Used the selected waveform origin, event maps, source metadata, and full source hash records through the direct waveform parent. The publication package records this source chain.

  3. usesFive calibration pulses gave mean later signed template AUC of 0.939 compared with 0.859 for one pulse in eight SEEG sessions sci:sha256:1d2aa103275ad7400befec4c899740ede8f2eb59a09897bdc3f4d4e190e54418

    Used its fixed selected recording pairs and first-five pulse calibration choices at 86 sites. No new contact selection used the test scores.

  4. usesAdded fitted 6 Hz phase beyond voltage size increased mean patient error by 2.28% for 20 to 100 ms SEEG forecasts in eight patients with five fit pulses per site and ridge strength 1 sci:sha256:7bbd7cbd1dc22576e7d3540b92dbf1e3e8c0972f18b810fa6bda683d5d9e96f4

    Used the GPL retrieval code through the direct waveform parent. The code comment and source licenses retain this earlier code source.

  5. usesA geometric median reduced 20–500 ms SEEG error with one simulated gain error among five calibration pulses in eight patients sci:sha256:c37805e37f6922e0de8e20f0231c72f98687698645324f2c0c6261e9d3ce9010

    Used inherited full source verification receipts for all eight public derivative files. Those receipts checked a different compact product archive. The present run rebuilt patient 01 from its complete source file and verified an exact match to the included voltage windows.

  6. usesdoi:10.18112/openneuro.ds004696.v1.0.1

    The analysis uses selected processed trial voltage from OpenNeuro ds004696 version 1.0.1; the saved source metadata records this version and its CC0 license.

  7. doi:10.1523/JNEUROSCI.2201-22.2023

    The cited source paper describes the eight-patient SEEG stimulation study represented in ds004696.

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