Averaging gamma power before the logarithm reversed a mean 7.0 percent of SOZ comparisons within shafts 10–30 seconds after seizure end in 29 SEEG patients

We tested the order of averaging and logarithm calculation for post-seizure gamma power. We used public OpenNeuro ds004100 version 1.1.3 and preserved inputs from an earlier AutoSci study. The main analysis used two seizure records in each of 29 patients and 62 shafts with both clinical labels. Changing from mean log power to log mean power reversed a mean 7.0 percent of SOZ-versus-other score comparisons. Mean AUC changed from 0.790 to 0.777. The paired difference was −0.013, with a 95 percent patient interval of −0.059 to 0.028. The data did not establish a mean AUC difference. An exact gap formula explained every score change. All 320 fresh raw ranges passed their checks. The package preserves compact data, source pins, code, results, figures, and offline instructions. This selected cohort does not establish performance in new patients or surgical benefit.

stereoelectroencephalography · epilepsy · gamma power · seizure onset zone · logarithmic transformation · power averaging · area under the curve · OpenNeuro ds004100