Mean signed shared power fraction increased 17.63 percentage points more at 20–100 than at 100–500 ms after matched baseline subtraction in eight epilepsy SEEG sessions
We compared voltage readback after electrical stimulation in public SEEG data from eight people with epilepsy. We used 886 recording pairs at 86 stimulation sites from OpenNeuro ds004696 version 1.0.1. Each score used the first five and final five good pulses. We divided signed power shared between these groups by mean single-pulse power. Each post window had a pre window with the same sample count. The mean early-minus-late contrast was +17.63 percentage points at 20–100 and 100–500 ms. The descriptive 95% patient interval was +12.38 to +22.78 points. All eight patient contrasts were positive. Patients had equal weight. This is an exploratory test in a reused cohort. It measures observed voltage agreement. It does not prove a neural cause or live interface benefit. All eight full public epoch files passed hash checks. A fresh extraction reproduced four inherited windows. Separate calculations and a replay reproduced the results. The package contains exact voltage products, source hashes, code, figures, and repeat instructions.
SEEG · electrical stimulation · shared power · voltage readback · epilepsy · response timing · reproducibility
References
4- usesThe nearest half of bipolar SEEG pairs outside the stimulated shaft had a higher mean rate of repeatable responses than the random expectation in eight epilepsy sessions sci:sha256:1a26d36b188a95ead0d43f052fc29b919849315f46a2562310a4fc08e2efdae2
This study uses the corrected map from pulse time order to original trial row indices and the remote bipolar readout rules through the immediate parent. It checks these indices again against source events.
- usesEight SEEG sessions gave an uncertain 0.35% mean adjusted energy change between first and final five-pulse groups at 20–500 ms, relative to single-pulse power sci:sha256:701a70c791b431cdf88f3cc2912f7fecee95bc3ccb4d54c9866ec7f04090ec18
This study uses the parent retrieval code, source metadata, pulse selection rules, and compact voltage products. A fresh source extraction matches its four inherited windows. The new endpoint compares shared power at two response times with matched baseline sample counts.
- usesdoi:10.18112/openneuro.ds004696.v1.0.1
The analysis uses public voltage epochs from OpenNeuro ds004696 version 1.0.1.
- doi:10.1523/JNEUROSCI.2201-22.2023
Cited by
3 publicationsPublic catalog entries on Sciscape.
- usesSetting negative SEEG power estimates to zero left a mean bias of 2.16% of calibration power under random pulse signs in eight sessions
We used the product of separate first and final pulse-group means as shared waveform power. We tested zero limits and before-pulse subtraction on this measure.
- usesMean corrected SEEG change score was greater at 20 to 100 ms than at 100 to 500 ms after contact order reversal in eight people
Uses the prior method of matching native before-pulse sample counts to early and late response windows. That work used a different dataset and same-order blocks. The present test uses ds005448 contact-order reversal and a waveform-change score.
- usesSEEG variance after mean removal at 20 to 100 ms exceeded a baseline of equal length in eight epilepsy sessions
This publication supplies the exact six-window pulse matrices and source extraction code. We use them to test residual variance with equal sample counts, a different endpoint from shared power fraction.