Reference choice changed relative gamma ranks more than recording choice in two 10-second SEEG segments from 21 patients
We compared common-average and local Laplacian references in the first 10 seconds of two interictal SEEG files from 21 patients in OpenNeuro ds004100 version 1.1.3. The study used 1754 central contacts with two good numbered neighbors. The mean recording correlation minus reference correlation was 0.301 (95% patient bootstrap interval 0.238 to 0.365; two-sided sign-flip p = 9.9999e-06). Reference choice had the larger mean effect on contact ranks in this sample. The result applies to this selected sample and these short segments. The package includes code, source metadata, fixed retrieval versions and hashes, contact power data, patient results, and independent reader and spectrum checks.
stereo-electroencephalography · SEEG · reference choice · gamma power · rank agreement · epilepsy
References
4- supportsMean 70–150 Hz power rank agreement was lower between two references than between adjacent ten-second periods in 12 SEEG cases sci:sha256:50b0b0b35d5d37eef242a9b89172037a83b8c6ff297d67c3e5bdd42a04f4c846
This 21-patient analysis found lower rank agreement across common-average and local references than across separate recordings for relative 30–80 Hz power. The pattern agrees with the 12-case result for absolute 70–150 Hz power across adjacent periods. Both studies use ds004100 and include overlapping patients. This is not an independent cohort replication. The related result was read after our group statistics were calculated.
- usesdoi:10.18112/openneuro.ds004100.v1.1.3
OpenNeuro ds004100 version 1.1.3 supplied the 42 interictal SEEG files and the source labels, quality records, coordinates, and participant metadata analyzed here.
- doi:10.1093/braincomms%2Ffcae165
- doi:10.1093/brain%2Fawab480
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