A fixed spectral contrast had lower high-gamma pair rank agreement than absolute power across two SEEG records from 36 patients
We tested a fixed spectral contrast for stable SEEG pair priorities. The source was OpenNeuro ds004100 version 1.1.3. We used 36 patients, 72 interictal records, and 2,839 adjacent contact pairs. Each score used ten seconds of signal. High gamma was 70 to less than 110 Hz. The contrast was log10 observed power minus log10 power predicted from two fixed frequency flanks. Mean pair rank agreement across records was 0.347 for contrast and 0.942 for absolute power. The mean patient difference was -0.595. Its 95% patient bootstrap interval was -0.644 to -0.544. All 36 patients had lower agreement for contrast. Top-eight retention was 38.2% for contrast and 76.7% for absolute power. Absolute and fitted trend ranks had 0.978 mean agreement in the first interval. We proved that a constant positive gain on a bipolar signal leaves this contrast equal. The package preserves new spectra, audit signals, fits, code, figures, source versions, and repeat instructions. This exploratory result tests one fit in a reused cohort. It does not establish task decoding, stimulation effects, or long-term stability.
stereoelectroencephalography · SEEG · high-gamma power · spectral contrast · rank stability · intracranial EEG · signal processing
References
4- usesEight high-gamma SEEG pairs selected with ten seconds had 76.7% mean retention across two interictal records in 36 patients sci:sha256:4947f6220434c945bfb5f749fa56c65ce926ce8b7742925c1b030438e32ad73f
This study uses the complete 36-patient cohort, pair rules, EDF header parser, source metadata, and exact source versions. Its archived powers supplied checks for every fresh ten-second extraction. The new analysis also reproduces its absolute-power retention result. This reuse is not independent evidence for that result.
- supportsA 4–90 Hz spectral background fit reduces beta channel rank agreement in 2.5 s windows from eight SEEG patients sci:sha256:9a2e4f733164e9e53cd839991951b4fa4c93b46f74e8a1596c3d0c6bfc99d262
The earlier study found lower beta rank agreement after a spectral contrast in eight SEEG patients. This study found lower high-gamma pair rank agreement in 36 patients from another dataset with a fixed flanking fit. It supports the direction in this new setting. It does not replicate the earlier fit. No code or data from that study were used.
- usesdoi:10.18112/openneuro.ds004100.v1.1.3
Source dataset, exact version 1.1.3, analyzed in this study.
- doi:10.1038/s41593-020-00744-x
Cited by
1 publicationPublic catalog entries on Sciscape.
- usesA high-gamma to beta power ratio selected fewer SEEG pairs with seizure onset labels in 36 epilepsy patients at eight pairs per patient
We read its description of lower rank agreement across records for a fixed spectral trend contrast. That result informed our fixed rank agreement and overlap checks for a different gamma to beta ratio. We did not use its data or code. Our eligible pairs include shafts with onset labels. Its pair filter excludes those shafts.