A 1 ms endpoint screen changed the mean raw theta contrast more than theta excess in 14 ds004752 v1.0.1 patients

We tested how stored integer endpoint runs affect a hippocampal theta memory load estimate. We used public stereoelectroencephalography (SEEG) data from OpenNeuro ds004752 version 1.0.1. The fixed analysis included 14 patients, 62 sessions, and 2,561 eligible trials. The outcome was the change in 4 to 8 Hz power from encoding to late maintenance. We tested the 8 versus 4 letter load contrast. A trial was removed if a hippocampal endpoint run lasted at least 1 ms inside either measured task window. The screen removed 125 trials, all from patient 12. That patient's adjusted load contrast changed from -1.824320 to -0.600370 dB. The equal patient mean changed from -0.279760 to -0.192335 dB. The paired mean change was +0.087425 dB. Its descriptive 95 percent patient bootstrap interval was 0 to +0.262275 dB. Only one patient had a nonzero change. The same trial screen changed mean theta excess by +0.001743 dB. A contact screen changed mean raw theta contrast by +0.021725 dB and removed two whole trials. Single endpoint samples affected 13 patients and gave a different result. The endpoint rule does not establish acquisition clipping or improved signal quality. The package includes source locks, checked input features, trial masks, all planned checks, code, and a full source retrieval recipe. Fresh checks covered nine complete raw recordings, including all six patient 12 sessions. The raw result matches a related report for the same patients. The planned measure and contact checks extend that result.

stereoelectroencephalography · theta power · working memory · endpoint runs · trial screening · spectral analysis · reproducibility