Selected 4 to 30 Hz SEEG frequencies had greater local prominence than shaft controls in paired 60 s files from 36 epilepsy patients

A selected frequency retained greater local prominence in a second SEEG file than control frequencies from the same shaft. Selection used centers from 4 to 30 Hz. We tested the first 60 s of two interictal files from each of 36 epilepsy patients in OpenNeuro ds004100 version 1.1.3. The test used 2,031 disjoint bipolar pairs on 456 named shafts. Each patient had equal weight. The mean difference was 0.539 dB. The patient bootstrap 95 percent interval was 0.426 to 0.664 dB. The effect was positive in 34 patients. All six fixed checks had positive means. The interval assumes independent, exchangeable patients. The result shows transfer of local spectral shape under the fixed method. It does not establish a neural oscillator, stability across days, or a clinical benefit. The metadata does not establish the actual recording interval. Broadband curvature and nonneural signals can contribute. All code, compact spectra, scores, random draws, source metadata, and fixed retrieval recipes are included. All 72 source hashes passed. Separate calculations checked all endpoint scores. The full extraction and analysis were repeated.

stereoelectroencephalography · SEEG · local spectral prominence · frequency selection · Welch spectrum · epilepsy · signal processing · reproducibility