With a fixed model, a beta SEEG spatial score did not change under common gain in 34 records and showed no clear mean post-label rise

We tested whether spatial signal changes remain after common amplitude gain is removed from beta SEEG rows. The test used 34 OpenNeuro ds006519 records from 21 people. With a fixed model, A = pQ/E stayed unchanged under nonzero common gain. We matched filter resets and warm-up across fit, calibration, later baseline, and marked post-stimulation windows. The main panel excluded the stimulation shaft. The mean spatial flag rate changed from 5.79% to 5.00%. The change was -0.79 percentage points, with a 95% person bootstrap interval of [-2.04, +0.40]. A controlled gain of three left every spatial flag unchanged. Amplitude and joint rates rose above 99%. Fixed spatial checks also had intervals that crossed zero. The package includes new extracted inputs, all scores, code, four figures, and full source hashes. Exact source and numerical replay checks passed. The test does not show a causal stimulation effect, a recovery delay, or better BCI command accuracy.

stereoelectroencephalography · SEEG · brain-computer interface · signal monitoring · beta band · spatial score · common gain · stimulation · bootstrap