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eess.SP · Signal Processing

Local symmetric whitening slightly lowered transfer correlation in SEEG files from 36 epilepsy patients at 1 to 80 Hz

This test used two public SEEG files from each of 36 epilepsy patients in OpenNeuro ds004100 version 1.1.3. It asked if local covariance calibration improves transfer of the first fitted canonical correlation mode. The source file supplied the fit. One target block supplied covariance within each shaft group. A separate target block supplied the evaluation score. Each block had 30 seconds of filtered samples. Symmetric whitening retained the source mode directions. Mean test correlation fell from 0.285282 to 0.282149. The equal-patient change was -0.003132. Its descriptive 95 percent patient bootstrap interval was -0.004937 to -0.001279. Scores fell in 27 patients and rose in nine. All seven fixed conditions are reported. Fresh raw ranges rebuilt all 72 covariance inputs exactly. Two complete numerical repeats matched. The package preserves inputs, code, weights, results, source hashes, and repeat instructions. The filters act forward and backward in time. The test is offline. The finding does not establish a neural connection, an optimal calibration rule, or clinical benefit.

stereoelectroencephalography · SEEG · canonical correlation analysis · symmetric whitening · covariance calibration · signal transfer · epilepsy

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References

6
  1. usesRidge 0.1 lowered mean transfer correlation of the first fitted mode between contact label groups in public SEEG data from 36 patients at 1 to 80 Hz sci:sha256:aa59fc45f955148f9d30fa459bc9b86978e5e5e28f348da7086cdfd6f259654f

    Its fixed ridge transfer result in the same 36 patients motivated this local calibration test. The present study evaluates one separate target block and adds target local covariance calibration.

  2. usesIn 36 patients with fixed SEEG contrasts, mean change in estimated canonical correlation spectra was larger between files than between adjacent blocks at 1–80 Hz sci:sha256:1217c177ec55b99e3867daa6135687900230630b32c8a790c700777fcc5adf29

    This work supplied 72 compact covariance inputs, one signal example, 221 metadata files, and pinned public range records. Its study of changes across files informed the calibration question. The present study reuses its patients.

  3. usesEdges that share a contact are more common among the strongest 5 percent of 1–80 Hz bipolar SEEG correlations in 36 epilepsy patients sci:sha256:7dc3370736cdefb57323429971522e882b644b700faccfda51b916b3d865f58f

    The original EDF header decoder and public range provenance originate in this work. The preserved decoder was obtained through the later input publication. It enabled fresh native-voltage reconstruction.

  4. usesTwo bases of the same SEEG contrast space gave different 1–80 Hz correlation participation ratios in 36 patients sci:sha256:901bade82e1972a491fb8b27d87ddf5ae157f439c20fb612d6d24768419473f2

    The covariance extraction, raw rebuild code, metadata check, and contrast helper code originate in this work. They were obtained through publication 7a35a10e-9920-4f7c-b975-78ef6e14d0b5. The helper restores covariance and defines consecutive contact paths.

  5. usesdoi:10.18112/openneuro.ds004100.v1.1.3

    The analysis used two interictal files from each of 36 patients in OpenNeuro ds004100 version 1.1.3.

  6. doi:10.1002/hbm.25090

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