SEEG variation ranks had greater agreement than mean waveform size ranks across contact order reversal at 20 to 500 ms in eight people

Five early pulses gave greater later SEEG rank agreement for variation than for mean waveform size in eight people with focal epilepsy. The fixed public sample had 96 stimulation conditions. Each condition had five early pulses and five later pulses after recorded contact order reversal. At 20 to 500 ms, the equal-person mean rank agreement was 0.908 for variation and 0.857 for mean waveform size. The difference was 0.052. It was positive in all eight people. The lowest variation quarter had a mean later variation percentile of 15.2 and a mean size percentile of 19.0. Before-pulse variation ranks also had high agreement. Stable background differences can contribute to the result. Time and contact order changed together. The study does not establish a causal order effect or better live interface performance. The package preserves exact products, native examples, code, figures, source versions, and checks of all 960 raw pulse ranges.

SEEG · intracranial EEG · rank agreement · waveform variation · stimulation · recording pairs · epilepsy