Expected late SEEG centre times differed between two and eight pulse averages in fixed ten-pulse pools from five patients

We tested whether pulse count changes the expected centre of squared mean SEEG voltage. We used fixed ten-pulse pools from five patients in OpenNeuro ds004457 version 1.0.2. We calculated every subset at counts two, five, eight, and ten for 1,081 retained links. Candidate times were 50 to 250 ms after stimulation. The mean of the five patient median absolute shifts was 9.168 ms for two versus eight pulses. Expected site order reversed in 19.28% of comparisons, with equal receiver and patient weights. A similar shift occurred before stimulation. The mean of subset centres differed from the centre weighted by subset energy. We give an exact moment decomposition and a constructed counterexample to monotonic ordinary centre change. All input arrays matched a fresh raw rebuild. A separate calculation checked all eight settings. A repeat gave sixteen identical numerical files. The package preserves voltage windows, code, source hashes, results, and retrieval instructions. These results concern fixed measured pulse pools. They do not establish a change in neural delay.

SEEG · pulse count · electrical stimulation · timing measure · subset averaging · intracranial EEG · fixed pulse pool