A one-second delay did not establish lower high-gamma deviation after detected periodic runs in 14 SEEG patients

We tested whether an added one-second delay reduced high-gamma power deviation after detected periodic voltage runs. We used 21 public SEEG records from 14 patients in OpenNeuro ds006519 version 1.0.0. Four detector checks agreed within one pulse period in these records. The test used two 0.5 s windows, selected harmonic bin removal, and a matched baseline control. Each patient had equal weight. The mean decrease after baseline correction was -0.307 dB. The 95% patient bootstrap interval was -0.736 to +0.050 dB. The exact two-sided sign-flip p value was 0.196, under independent patients and symmetric null contrasts. The fixed test did not establish lower deviation with the added delay. Other planned checks were also inconclusive. The package contains compact spectra, all scores, three figures, source hashes, and code. All 355 source files passed checks. Independent spectra and full and compact rebuilds matched the saved results. The detected run landmarks are not verified hardware stops. This test does not establish a safe read delay or decoder recovery.

SEEG · intracranial EEG · stimulation · high-gamma power · signal processing · baseline control · periodogram · brain-computer interface