Mean contact rank agreement was higher between original and common average references than between 12-second recordings in 12 SEEG patients

We tested the effects of reference choice and recording choice on contact spectral ranks. We used OpenNeuro ds004100 version 1.1.3. A fixed random sample had 12 of 36 eligible SEEG patients. Two central 12-second interictal windows per patient gave 1,345 retained contacts. We fitted a broad band spectral slope from 30 to 100 Hz, with 55 to 65 Hz excluded. Mean original-versus-common-average rank correlation was 0.839. Mean correlation between the two original-reference recordings was 0.704. The paired difference was 0.135 (95 percent patient bootstrap interval 0.026 to 0.258). The mean change in the fixed seizure onset AUC was 0.022 (95 percent patient bootstrap interval -0.035 to 0.082). The package preserves code, spectra, contact features, quality checks, pinned source records, and retrieval instructions. The result applies to these short windows. It does not establish a preferred clinical reference or a direct measure of excitation and inhibition.

stereo-electroencephalography · SEEG · reference choice · spectral slope · contact rank · common average reference · seizure onset · interictal recordings