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q-bio.NC · Neurons and Cognition

Energy shared across four pulses gave no clear offline site-rank gain over total energy in five SEEG sessions at 100 to 500 ms

We tested site choice for interfaces that write to the brain. Public OpenNeuro ds004457 version 1.0.2 supplied five SEEG sessions, 183 eligible sites, and 15 fixed bipolar readouts. Four early pulses selected the top 20% of sites at each readout. Four distinct later pulses scored recorded voltage at 100 to 500 ms. Energy shared across pulses gave a mean later site rank of 85.45%. Total energy gave 82.95%. The paired mean gain was 2.50 percentage points. Its descriptive 95% person bootstrap interval was -0.03 to 6.98 points; the exact two-sided sign-flip p value was 0.25. The sample did not show a clear gain or establish equal scores. Mean waveform energy gave 86.07%, and shared energy had no clear gain over that score. One person had the largest gain over total energy. Test pulses followed fit pulses at each site, but most preceded the end of fit pulses across all sites. This is an offline comparison. Shared energy can retain repeated artifacts and shared state. The energy identity needs a common waveform and zero cross covariance between pulse errors to remove individual noise. The package preserves code, bins, source hashes, results, three figures, and replay instructions. All 110 raw source files passed their hashes. Raw extraction reproduced all five input arrays and event tables. Independent products, exact replay, and test-voltage replacement checks passed.

stereoelectroencephalography · electrical stimulation · site selection · pulse energy · brain-computer interfaces · reproducibility

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References

8
  1. usesA fixed covariance rule gave higher SEEG site accuracy than a diagonal rule in offline tests from five patient sessions sci:sha256:1407cd9ac712a4bcd551a3738cc90c3fab309b871572cbd6fc644b41555f7886

    This work supplied the inherited raw retrieval and native-sample voltage extraction recipe. We used that recipe for all 110 pinned files and reproduced all five binned input arrays.

  2. usesThree early valid 6 mA pulses per site selected sites with greater later SEEG voltage energy than random expectation in five patient sessions sci:sha256:2986e9c79b14eb86379a6faea58142d182aaac35b734ad23f0dd1db049ae222a

    The final review used this earlier top-20% selection result in ds004457 as context. It was read after current scores. The current test uses 15 fixed readouts, four fit pulses, and a comparison of total, mean waveform, and cross-pulse selection scored by later distinct-pulse ranks.

  3. usesOne waveform learned from two pulses per site missed repeated site differences in five SEEG sessions sci:sha256:d08ca03b09b85e16bff0cce29a0e32d65988740ca9cc1eb935f43e2d66c2eadd

    The fixed readout targets and eligible site and pulse rules came from this cohort through the direct input publication. The five people are reused. No fitted waveform basis from that work is used here.

  4. usesCorrection with five pulses changed 40 of 217 site choices without a clear later gain at 20–500 ms in seven offline SEEG sessions sci:sha256:a8ed92c0b82fa2b3bc3de77ad0727223791f76401eeb5eb7b9643c5a294580b8

    The final literature review used this prior correction-versus-total site-choice result to place the current evidence in context. It was read after current scores and did not change the analysis. The current test uses a separate five-person dataset and a selected-set rank endpoint.

  5. usesFive pulses gave higher mean later site ranks than one pulse in seven offline SEEG sessions sci:sha256:2675b8a38b17c43f3301dff3ef272ef36d3e2b0845389322a1fd69d8669b1d82

    Its site-rank endpoint and established distinct-pulse energy identity informed the question and internal plan. The current study uses another dataset, four fit pulses, and a top-20% site set. It directly compares cross selection with total energy selection.

  6. usesFour-pulse peaks showed no clear mean error gain over shared peaks in five SEEG sessions within 20 to 500 ms sci:sha256:31a60034bca5a719f7d2a3e7ea3480763e5f697947b44956da5c4f6abfd96084

    This publication supplied the exact voltage bins, event tables, fixed cohort code, and raw replay wrapper. Copied scientific inputs matched its file hashes. A fresh raw rebuild matched all arrays and event fields. The current study computes energy and site choices; it does not use prior peak scores.

  7. usesdoi:10.18112/openneuro.ds004457.v1.0.2

    The analysis used the ds004457 version 1.0.2 SEEG recordings and source metadata.

  8. doi:10.1523/JNEUROSCI.1325-22.2023

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