Bipolar subtraction changed site accuracy in both directions at 30–100 ms in five SEEG sessions
We tested stimulation site readout in five public SEEG sessions from OpenNeuro ds004457 version 1.0.2. Each of 185 sites supplied four training pulses and four later test pulses. At 30–100 ms, mean accuracy was 18.1% with bipolar subtraction and 19.5% with two contacts used together. The paired mean difference was −1.4 percentage points. Its descriptive 95% patient bootstrap interval was −8.1 to +4.1 points. Subtraction increased accuracy in three patients and decreased it in two. A fixed method with equal weight for sum and difference waveforms gave 22.9% mean accuracy. That secondary result needs an independent test. Before-pulse accuracy was near uniform chance on average. Blocked pulse order and incomplete reference metadata limit a neural interpretation. The package preserves code, inputs, figures, predictions, source hashes, and a raw retrieval recipe. All raw files, a full input rebuild, an independent scalar decoder, and a repeat analysis passed the saved checks.
stereoelectroencephalography · SEEG · brain-computer interface · site decoding · bipolar subtraction · signal representation · electrical stimulation
References
4- usesSEEG response shapes at 15–100 ms gave higher site identification accuracy than shapes at 100–500 ms within each of five patient sessions sci:sha256:aa5b71d76d214f861e99964287f9da01f3f9fc6c707a4dcfe24807283918ab40
Use the original contact choices and source extraction preserved through the later calibration study. Its known time-window results informed the fixed early, late, and before-pulse controls. This analysis compares recording representations under a new fixed first-four and last-four split.
- usesFour calibration pulses per site selected eight sites with higher mean later-pulse identification accuracy than random sets in five SEEG sessions sci:sha256:734ed418ba7748370955abc8656549ca19d02417622be27efe64bff0eec4d5eb
Reuse all five two-contact input files, event tables, source metadata, and the exact raw extraction and retrieval code. Keep the inherited contact and eligibility choices. Test all eligible sites with six fixed representations. The new primary bipolar predictions match its all-site decoder.
- usesdoi:10.18112/openneuro.ds004457.v1.0.2
Source dataset, version 1.0.2, identified in the report and pinned source manifest.
- doi:10.1523/JNEUROSCI.1325-22.2023
Cited by
4 publicationsPublic catalog entries on Sciscape.
- usesA 1 mV RMS error model gave 128–178 ms guards for a causal 70–110 Hz filter in five SEEG recordings
We used its fixed ventral temporal contacts, pinned source manifest, and MIT raw retrieval recipe through the later extraction package. We preserved its code license and verified all 30 raw file hashes.
- usesReplacing pulse samples changed zero-phase 70–110 Hz SEEG voltage above baseline RMS at 20–50 ms in 27/400 pulses (five patients).
We used its fixed contact choices, source manifest, BIDS metadata, and MIT raw retrieval code. These files enabled a new raw download and a new filter sensitivity analysis.
- usesRepair norm budgets gave a median 21.5 ms guard at baseline RMS for a zero-phase 70–110 Hz filter in 400 SEEG pulses from five patients.
The fixed contact choices and raw retrieval code came from this work through the parent package. Earlier decoder scores were not analysis inputs.
- usesCausal filtering gave more output changes above baseline RMS at 50–80 ms with matched 70–110 Hz gain (five SEEG patients)
Its raw retrieval recipe and source contact choices reached this study through the cited pulse audit. We retained the retrieval code and source credits and checked the selected raw files again.