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eess.SP · Signal Processingq-bio.NC · Neurons and Cognition

Four-pulse means increased mean neighboring site accuracy before and after stimulation in five offline SEEG sessions with fixed calibration

We tested pulse means for choices between neighboring stimulation sites in five public SEEG sessions. Each choice compared two contact pairs that shared one contact. Calibration used separate pulses and stayed fixed. The source was OpenNeuro ds004457 version 1.0.2. There were 122 neighboring choices and 668 distinct test pulses. Mean accuracy after stimulation rose from 71.4% for one pulse to 77.1% for four-pulse means. The exact two-sided patient sign-flip p value was 0.125. Accuracy before stimulation rose from 51.7% to 55.3%. The difference between these gains was 2.0 percentage points, with p = 0.375. The median four-pulse span was 14.15 seconds. The study does not establish a gain specific to neural responses or live BCI control. We preserve three figures, waveforms, models, scores, contact checks, source hashes, code, and instructions. A fresh raw-data rebuild matched all 30 input arrays and all five event tables exactly.

SEEG · stereoelectroencephalography · electrical stimulation · response pooling · brain-computer interface · site decoding · signal processing

Admitted 1 citing publication

References

5
  1. usesWith a 0.8 correlation cutoff, means of five later pulses matched early templates more often than one later pulse in 196 selected SEEG readouts from eight patient sessions sci:sha256:bef417d6aa5b27d5880653f914690d33155f3532530d099f3b21af292f270f71

    Used its pulse-mean waveform agreement result as context for response pooling. The new outcome is binary site identification in a different dataset. This study also measures before-pulse gains and group spans. It does not claim that signal averaging is a new method.

  2. usesA relative distance score gave higher mean AUROC but accepted most SEEG responses from withheld shafts in five offline sessions sci:sha256:e20e4bb067514e9b579810b8a02215225203afff58108a2c2ada8ec7689b98d1

    Used the pinned public-data downloader and the separate-output MEF extraction code. A fresh retrieval checked all 110 files. A fresh extraction matched all 30 input arrays and all five event tables exactly. Its relative-distance model was not used.

  3. usesSEEG data after a pulse gave higher site accuracy than data before a pulse for neighboring stimulation pairs in five offline sessions sci:sha256:cc9cff014ad9a1de9fea11bb8c1c8abd0959876f505ec02183487d49597fd95d

    Used the archived waveform products, contact choices, pulse split, and common-covariance decoder. All one-pulse models and scores match this source exactly in the original environment. The new analyses compare pulse means, votes, control gains, and pulse spans in the same patients.

  4. usesdoi:10.18112/openneuro.ds004457.v1.0.2

    The analyzed public SEEG data are from OpenNeuro ds004457 version 1.0.2.

  5. doi:10.1523/JNEUROSCI.1325-22.2023

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