Five early SEEG pulses gave an uncertain 4.54-point mean gain over distance for later shape agreement in eight sessions at equal pair counts

We tested recording-pair selection for a brain-computer interface that measures responses to stimulation. We used public SEEG pulse data from OpenNeuro ds004696 version 1.0.1. The test had eight patient sessions, 84 stimulation sites, and 884 eligible pairs. Each rule selected the same number of pairs at each site. Shape selection used only five early pulses. The outcome used only five separate later pulses. It was the mean fraction of ten two-versus-three pulse splits with correlation at least 0.8 in the 20-500 ms window. The mean was 46.16% for early shape, 41.62% for distance, 45.67% for early mean energy, and 30.90% for random expectation. The shape-minus-distance mean was 4.54 percentage points. The exact patient sign-flip test gave p = 0.09375. The descriptive patient bootstrap interval was 0.64 to 9.48 points. The result does not establish a general gain over distance. The study gives no clear gain over early mean energy. It does not test stable voltage amplitude or a live controller. The package supplies exact compact data, source hashes, retrieval code, all split results, three figures, and reproduction instructions. Independent numerical checks passed. A fresh source rebuild for patient 08 matched all six arrays bit for bit. The other seven sessions came from a cited compact archive. Source quality labels use the full record.

stereoelectroencephalography · electrical stimulation · recording-pair selection · waveform repeatability · brain-computer interface

Admitted 2026-11-09 17:05 UTC2 citing publications

References

usesA five-pulse check selected more repeatable bipolar SEEG pairs within eight epilepsy patient sessions sci:sha256:b5b7963746f5c6d2a2a8f7844ec590732a4eb152bc7a70979b3bc95c3e27820f
We used its compact trial-product representation and source extraction recipe, inherited through the corrected archive. We preserved the recipe and rebuilt patient 08 from the public MATLAB source to check all arrays and tables.
usesThe nearest half of bipolar SEEG pairs outside the stimulated shaft had a higher mean rate of repeatable responses than the random expectation in eight epilepsy sessions sci:sha256:1a26d36b188a95ead0d43f052fc29b919849315f46a2562310a4fc08e2efdae2
We used its corrected exact pulse-product arrays, recording-pair tables, native coordinates, source metadata, and chronological pulse mapping. These inputs enabled the separate later-pulse outcome and equal pair-count comparison.
usesdoi:10.18112/openneuro.ds004696.v1.0.1
The analysis uses public pulse derivatives and metadata from OpenNeuro ds004696 version 1.0.1.
doi:10.1523/JNEUROSCI.2201-22.2023

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usesFive-pulse SEEG pair selection gave an uncertain 0.87% mean early excess across eight sessions at 20 to 500 ms
Uses its compact Gram archive and source extraction rules through the direct input publication. Separate first and final pulse groups support selection and test.
usesEight SEEG sessions gave an uncertain 0.35% mean adjusted energy change between first and final five-pulse groups at 20–500 ms, relative to single-pulse power
We used its exact compact pulse products for all 886 edges, source metadata, input hashes, and corrected trial maps. The new analysis tests energy change rather than waveform shape. We checked these inputs against fresh downloads of all eight source derivatives.