Equal-energy pooling gave a larger mean gain over the harmonic local score between files than within files in 36 patients with 1–80 Hz SEEG

We measured how equal-energy covariance pooling changes participation ratio in 36 patients with public SEEG. At 1–80 Hz, the mean gain was 5.72% within files and 9.93% between files. The paired difference was 4.20 percentage points, with a 95% patient bootstrap interval of 2.64–6.08. Gains use the harmonic mean of local scores. Exact formulas separate spectrum differences from spatial alignment differences. An added check with separate filter segments gave a difference of 3.94 points. All 72 raw recordings were rebuilt for each design. Independent trace calculations and complete repeat checks passed. The package preserves code, primary inputs, provenance, results, figures, and retrieval instructions. The results concern estimated covariance in short windows from patients with epilepsy. They do not establish a change in brain state or neural source count.

SEEG · participation ratio · covariance pooling · signal dimensionality · epilepsy