Minute groups gave larger expected HFO channel contrasts than random event labels in the first hour of 18 public SEEG sleep records under fixed totals

We tested how the reference unit changes HFO channel map variation. We used the first hour of 18 public SEEG sleep records from OpenNeuro ds005398 version 1.1.3. Both references kept whole-hour channel totals fixed. Random event labels also kept every time-block total fixed. Complete minute groups gave 2.18 times the exact mean spatial contrast for STE marks and 2.17 times for MNI marks. All 18 ratios were above 1 for each detector. The STE patient bootstrap interval was 1.84 to 2.60. These intervals assume independent comparable patients. Random labels gave 5.94 percentage points more STE top-list overlap than complete groups. The ratio was smaller with the source score threshold and with one pair per shaft. Exact formulas, proofs, source files, code, and all results are preserved. An offline repeat matched all 63 numerical output files. The result is conditional on released detector marks and the stated references. It does not identify a neural cause or clinical performance. The patients were reused from earlier work.

high-frequency oscillations · stereoelectroencephalography · event marks · channel maps · spatial contrast · conditional references · OpenNeuro