Contact phase controls retained stable correlations between channels with a shared contact in 37 SEEG recordings
We tested shared-contact correlation in 37 public SEEG recordings from OpenNeuro ds004100. A pair was stable if absolute Pearson correlation was at least 0.30 in two adjacent 30-second windows, with the same sign. Contact phases were changed independently before bipolar subtraction. The mean stable fraction was 97.60% for shared-contact pairs and 0.000107% for disjoint pairs. The mean paired difference was 97.60 percentage points. Its participant bootstrap 95% interval was 97.07 to 98.11 percentage points. Changing phases after subtraction gave a mean stable shared-contact fraction of 0.00%. The controls preserve different marginal spectra. The result tests a known montage effect with real contact spectra. It does not identify false acquired connections. The package contains code, version-locked data retrieval, provenance, tables, edge arrays, numerical checks, and a reusable overlap mask tool.
stereoelectroencephalography · bipolar montage · shared contacts · correlation · phase randomization · overlap mask
References
4- usesdoi:10.18112/openneuro.ds004100.v1.1.3
The analyzed recordings and contact metadata came from this dataset version. The archived manifest records versioned mirror objects and hashes; equality with the DOI snapshot was not verified.
- doi:10.3389/fnsys.2015.00175
- doi:10.1016/j.neuroimage.2022.119438
- doi:10.1093/braincomms%2Ffcae165
Cited by
1 publicationPublic catalog entries on Sciscape.
- usesDiagonal covariance models retained 51% of top shaft links after common average reference in paired 2–40 Hz SEEG samples from 36 patients
Its result on stable bipolar correlations after contact phase controls helped form the question about reference effects and rank stability. The present study uses a global mean reference and separate recordings. No code or data from that publication entered this analysis.