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q-bio.NC · Neurons and Cognition

Endpoint checks missed interior phase errors above 45 degrees in 30 to 70 ms delay tests with a 2 s offline theta filter in 36 SEEG patients

An endpoint phase check can miss an error at an interior delivery sample. We tested this rule with public SEEG data from 36 selected epilepsy patients in OpenNeuro ds004100 version 1.1.3. The main test used a 2 s offline theta filter, requested delays from 30 to 70 ms, and a 45 degree error limit. Of 34,571 endpoint passes, 694 had an interior error above the limit. In 399 passes, no fixed angle could meet the limit at every included native sample. The mean patient false pass rate was 2.45%, with a descriptive 95% bootstrap interval from 2.02% to 2.93%. Both failure types occurred in all 36 patients. The package includes a finite phase audit tool, source data, retrieval records, code, results, and figures. All 72 public source prefixes rebuilt the archived inputs exactly. This is an offline audit on a reused sample. It does not measure live interface accuracy or a stimulation effect.

phase estimation · stereoelectroencephalography · brain-computer interface · delivery delay · circular statistics · theta filter

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References

8
  1. usesA zero-sum filter removed constant-baseline effects on interior theta phase targets in 36 public SEEG files sci:sha256:14f4384bd9f6a2ceff410544533d4f58ffe6f11ece71fdf90c67beca78708b48

    We use its coefficient mean subtraction for a check added after the primary scores. This removes the constant voltage response of the complex filter. It does not change the primary calculation.

  2. usesFits to eleven requested 25–75 ms delays reduced mean offline theta phase loss across files from 36 SEEG patients under an independent delay law sci:sha256:a1cbe884c17e49bc71260a0b483f396b05419207357994fc1734a6b5ba432604

    This package supplies the exact 72 selected digital inputs, source records, and pinned retrieval code. The voltage conversion and centered theta filter follow its conventions. No fitted reader or outcome score was imported.

  3. usesOffline 4–8 Hz Fourier phase moved backward in SEEG baselines from all 21 tested patients sci:sha256:dae7c93d05df28b4f4e64227f414662fc5cde87958c077350de4b454e29c4919

    Its evidence about backward phase motion gives context for phase path checks. Its target and dataset differ. We imported no data, scores, or code from that work.

  4. usesComplex voltage targets reduced mean 50 ms offline theta phase error across files from 36 selected SEEG patients sci:sha256:7bb26e9262cd7cf318aacf4eb9c26e67d5a3c1bf62ddd55c19ff2723bdfab146

    This work is the earlier source of the fixed selected patient and contact inputs carried by the direct input package. The current study preserves that sample choice and its source records.

  5. usesOne phase estimate could not meet a 45 degree limit across unknown 30 to 70 ms delays at 47.8% of test times in seven SEEG rest pairs with a 2 s offline theta filter sci:sha256:fb9a0b3fcf4a2e3076fa5e1c54eda2e595eacebb47c3e94709b83b1531254509

    We use its full delivery set circular arc rule to compute the smallest possible largest phase error for one fixed angle. The new test compares this rule with two endpoint checks in another dataset.

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

    The publication analyzes selected SEEG inputs from this exact OpenNeuro release; its saved dataset metadata records CC0.

  7. doi:10.1038/s41467-025-59417-7
  8. doi:10.1016/j.neuroimage.2020.116761

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