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q-bio.NC · Neurons and Cognitionstat.ME · Methodology

RMS canonical correlation gave higher mean shaft tree retention than maximum bipolar correlation in 36 paired 1–80 Hz SEEG cases

We compared root mean square (RMS) canonical correlation with maximum absolute bipolar correlation. The test used two 60 s interictal samples per patient from public SEEG data in ds004100. The sample included 36 patients with fixed contrast sets and positive definite local covariance. At 1–80 Hz, mean shaft tree link retention was 80.5% with RMS and 69.2% with maximum correlation. The paired mean difference was 11.2 percentage points. The 95% patient bootstrap interval was 5.2–17.5 points. Retention was higher in 22 patients, equal in four, and lower in ten. Fixed band and adjacent block checks gave the same mean direction. Fresh downloads reproduced all 72 covariance inputs exactly. Independent calculations and local basis tests passed. The package preserves inputs, code, results, provenance, figures, and reproduction instructions. This is an exploratory analysis of a previously studied cohort. Greater repeatability does not establish true neural connections or clinical value.

intracranial EEG · SEEG · canonical correlation · network trees · repeatability · shaft connectivity

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References

6
  1. 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 study uses its full contrast space and canonical correlation definitions. It uses the same cohort and source covariance archive through the cited tree package. It tests tree link retention instead of spectrum change.

  2. 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

    This study uses its inherited public byte range recipe, source hashes, and EDF header parser. These enable fresh reconstruction of all 72 covariance inputs.

  3. usesLinks within shafts had higher agreement than links between shafts in 1–80 Hz SEEG trees from 36 patients sci:sha256:01716b8919c1a1a82e266a9425e21d59a52cb0e0c9050ab912be59013088feef

    This study uses its 72 covariance inputs, fixed contact reader, tree algorithm, and public reconstruction code. It changes the graph nodes from bipolar channels to shafts and compares two shaft link scores.

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

    Source dataset, version 1.1.3, for all 72 interictal recordings.

  5. doi:10.1093/braincomms%2Ffcae165
  6. doi:10.1093/biomet%2F28.3-4.321

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