A twofold target weight range reduced stable 1–80 Hz SEEG shaft leaders from 55% to 25% on average in 36 patients

We tested the leading bipolar channel within each named SEEG shaft. We used OpenNeuro ds004100, version 1.1.3. Each of 36 epilepsy patients had two 60-second interictal records. We derived the exact first target weight ratio that can tie a unique leader. The method covers every positive target weight vector within a specified largest to smallest ratio. It saves a vector that reaches each finite boundary. At 1–80 Hz, the mean fraction of shafts with the same equal-weight leader in both records was 54.8%. Requiring the same unique leader for every ratio up to two reduced the mean fraction to 25.1%. The paired loss was 29.7 percentage points, with a 95% patient bootstrap interval of 24.9 to 34.9 points. The test had 451 paired shafts and gave each patient equal weight. The reduction persisted with channels that did not share contacts. Numerical checks covered 7,836 profiles. Fresh retrieval of all 72 pinned source prefixes preserved every leader and bound decision. The package includes code, lossless covariance, source metadata, locked retrieval recipes, results, a proof, and reproduction commands. This is a method extension on previously studied patients. It tests weights on a fixed graph. It does not validate clinical localization or estimate unrecorded tissue connectivity.

stereoelectroencephalography · SEEG · bipolar channels · robust leaders · weight sensitivity · intracranial EEG · network analysis