Gain fits with shifts up to 19.5 ms left 1.93 times the matched control variance in 59 to 460 ms SEEG at 86 selected sites in eight people
We tested a response model for a brain-computer interface that reads signals during stimulation. Public OpenNeuro ds004696 version 1.0.1 supplied SEEG data from eight people with epilepsy. The first five pulses defined a template at each of 86 fixed sites. We fitted a signed gain and a time shift to 610 later pulses. Shifts could extend 19.5 ms in either direction. The test window was 59.1 to 460.4 ms after a pulse. A matched control added each fitted response to its recorded pre-pulse activity and used the same fit. The equal-person residual variance ratio was 1.93. Its descriptive 95 percent person bootstrap interval was 1.56 to 2.44. All eight person ratios exceeded one. The shift search reduced observed residual variance by 17.2 percent and control variance by 8.9 percent. Wider shifts and a different template also left excess variance. This test assumes that pre-pulse activity is a useful background reference. It does not identify a neural cause or measure live BCI performance. The package preserves voltage windows, source hashes, pulse fits, two figures, and reproduction documentation; GPL scripts are excluded from the public package.
stereoelectroencephalography · electrical stimulation · brain-computer interface · response variability · time-shift model · matched control
References
5- usesLater 20–500 ms SEEG variance outside a shape from five pulses was 2.11 times the variance before pulses at 86 selected sites in eight people sci:sha256:d7334af97e9ceb52d52f038db543c405d40b5dc0dfc1e79213b2dbb0abf242bb
This study uses the fixed site choices, voltage windows, pulse order, source records, and retrieval recipe from this publication. It extends the fitted-template variance test with finite time shifts and matched controls.
- uses4–30 Hz SEEG variance remained greater after stimulation outside an early response plane in eight epilepsy patients sci:sha256:4e0a00e389aea5abca17ff3342ffafee0158c25370913bed80856b89e41ce7ae
This study uses the response-plane and phase-slope test as a prior model check. It tests finite native-sample shifts and applies the same fit to constructed background controls.
- usesdoi:10.18112/openneuro.ds004696.v1.0.1
The analyzed voltage derivatives are from OpenNeuro ds004696 version 1.0.1.
- doi:10.1523/JNEUROSCI.2201-22.2023
- doi:10.1016/S1388-2457(01)00739-8
Cited by
4 publicationsPublic catalog entries on Sciscape.
- usesLater input gave a small, uncertain error reduction for five-pulse SEEG forecasts at 86 sites in eight people
We used the source-checked pulse windows, corrected event order, source pins, and fixed five-pulse readout choices.
- usesFive later pulses had 6.5 percent lower SEEG sample variation rank after stimulation than before it at 85 selected sites in eight people
Its gain and timing fit result motivates a separate test of remaining variation concentration. The present matched spectrum test measures sample spread rather than the amount left after those fits.
- usesEight learned shapes with a retained residual reduced SEEG forecast error in four of eight people at 86 selected sites
The study keeps its calibration-only readout choice fixed at all 86 stimulation sites.
- usesFixed window tests did not confirm shared variance reduction in 7 iEEG and 8 fMRI patients after stimulation of the amygdala region
Its response-gain and timing limits motivate the matched gain-projection check and the interpretation of residual variance. Our implementation and inputs are separate.