Twenty-second calibration in the current record gave no clear theta power gain over calibration from the previous session in seven people with depth SEEG

We tested one-Hz theta band selection in 215 public hippocampal depth SEEG records from seven people. Twenty seconds from the current record gave 33.51% held-out theta power capture. Calibration from the previous session gave 33.33%. The difference was 0.19 percentage points, with a descriptive 95% whole-person interval from -0.18 to +0.64 points. A fixed 4-5 Hz band gave 35.85% and exceeded current calibration in every person. The package provides a new test with chronological access rules, 250 native input records, source versions and hashes, code, three figures, all fixed results, and repeat checks. This is a power capture test. It does not establish decoder accuracy, a stable neural oscillator, a phase target, or clinical benefit.

brain-computer interface · theta power · SEEG · hippocampus · band selection · calibration · spectral power · chronological validation · epilepsy