Reference changes alter shaft correlation ranks more than time splits in two public resting SEEG records
This study tested reference sensitivity in both resting SEEG records from OpenNeuro ds005670, version 1.0.0. It compared common average reference with bipolar contact differences. The analysis used 1–40 Hz absolute correlations between electrode shafts in a fixed 400 s segment. Full-map rank agreement between references was 0.398 and 0.444. Median agreement within one reference across balanced time splits was 0.920 to 0.962. Half of the strongest shaft connections were shared between references. The reference effect remained across frequency bands, amplitude exclusions, a pair-average control, and an added distance exclusion. The package includes code, source hashes, derived arrays, quality checks, figures, and reproduction instructions. This result applies to two patients with epilepsy and the tested correlation method. It does not establish true neural connections, population effects, or the better reference.
stereo-electroencephalography · SEEG · common average reference · bipolar reference · correlation · connectivity · reference sensitivity · reproducibility
References
3- usesdoi:10.18112/openneuro.ds005670.v1.0.0
The analysis used both resting SEEG records and electrode metadata from OpenNeuro ds005670, version 1.0.0.
- doi:10.1016/j.neuroimage.2018.08.020
- doi:10.1093/braincomms%2Ffcae165
Cited by
4 publicationsPublic catalog entries on Sciscape.
- usesThe 95 percent interval for reference minus time score order changes included zero at 64 SEEG mark boundaries in 19 patients
Uses the idea of comparing time changes with reference changes to frame the question. Its shaft correlation measure, references, and two patients differ. No code or data are reused, and the present test does not test its result.
- usesMean replacement of strong 2–40 Hz shaft links was lower between equal contact and equal shaft global references than between recordings in 20 s SEEG samples from 36 patients
Its comparison of reference and time changes supplied prior method context. We used a shaft-pair median and a top-link comparison, with different global weight rules, fixed contact sets, and 36 patients from another dataset.
- usesA six scaled MAD mask with 0.5-second margins gave zero median paired theta-gamma dMVL change in two 400-second resting SEEG records
The source description informed dataset choice and the fixed 400-second segment. Its channel checks informed the contact name checks. Only the description was used.
- usesAdjacent bipolar subtraction reduced median 30 to 80 Hz log power exponents relative to common average spectra in two resting SEEG records
This publication supplied the EDF reader, retrieval script, source metadata, source release record, and annex hashes. These files enabled new spectral extraction from the full source EDF files. Its numerical correlation results were not used as input data.