Mean alpha peak recurrence at the same contact exceeded the shaft exchange expectation in paired 60-second SEEG files from 36 epilepsy patients under CAR

We tested whether alpha spectral peaks recur at the same SEEG contact above exchange within an inferred electrode shaft. We used paired 60-second files from all 36 patients with available paired SEEG records in OpenNeuro ds004100 version 1.1.3. The main rule used common average reference, a fixed log-frequency trend, and an 8 to 13 Hz search band. The peak height threshold was 3 dB. The frequency tolerance was 1 Hz. Mean recurrence was 43.9% at the same contact and 31.7% under exchange. The equal patient mean difference was 12.2 percentage points. The patient bootstrap 95% interval was 7.9 to 17.0 points. The difference was positive in 31 of 36 patients. Ten planned descriptive checks also gave positive mean differences. A fresh rebuild from all 72 byte-verified signal excerpts preserved every primary peak decision and all statistical endpoints. The recording interval is unknown. These results apply to the supplied files and the fixed peak rule. They do not establish neural oscillations, long-term stability, or clinical value. The package includes code, spectra, contact results, statistical draws, source records, and repeat instructions.

SEEG · alpha peaks · spectral recurrence · common average reference · electrode contacts · patient bootstrap · shaft exchange