Contact power sums reversed the mean theta to high gamma span contrast under common average reference in 36 SEEG patients
We tested a spectral measurement in public SEEG data. We used OpenNeuro ds004100 version 1.1.3. Each of 36 patients supplied two 60 second interictal excerpts. Each group had four consecutive contacts. The narrow pair used the middle contacts. The wide pair used the outer contacts. The theta to high gamma ratio used 4 to 8 Hz and 70 to 110 Hz. The mean wide minus narrow ratio contrast was 2.938 dB. Under common average reference, contact power sums without cross spectra gave -0.355 dB. The exact cross term was 3.293 dB. Its 95 percent patient bootstrap interval was 3.074 to 3.507 dB. This term was positive in all 36 patients. A shaft average reference changed the mean contact sum contrast to positive. The observed bipolar contrast did not change. The split depends on the contact reference and does not identify a neural cause. Population use of the interval assumes independent and exchangeable patients. The package preserves code, group powers, spectra, source locks, results, a raw example, and repeat instructions. All 72 raw hashes passed. A full raw rebuild reproduced all feature arrays and results.
stereoelectroencephalography · spectral power · cross spectra · bipolar montage · common average reference · theta · high gamma
References
5- usesA symmetric split gave real coherency the larger absolute CAR to bipolar slope term in 30–80 Hz SEEG fits from 36 patients sci:sha256:9ab9919bea9905193498b44d4f157aa2276f4dc982e2e892318709e4528a08f1
The prior separation of contact power balance and real coherency motivated the fixed reference checks. We tested a span ratio rather than a reference slope. The patients are reused.
- usesBipolar pairs across three intervals had higher mean theta to high gamma ratios than adjacent pairs in 35 SEEG patients sci:sha256:9ea39b10c62694ac124477465186af2b9fadb78737c14732bb1a94028b3bbb21
The prior span result and its adjacent difference power split defined the comparison for the original contact power test. The band rules and power terms differ. The cohort overlaps.
- usesContact group corrections reduced mean theta to high gamma ratio error compared with shaft corrections in paired 60 second SEEG excerpts from 36 patients sci:sha256:671cd1f735f316538c1b11e2768a26baa44164d9a13c7dfe64f15c60dd31771c
The final library check found a file transfer test and an adjacent difference decomposition in the same 36 patients. We used it to state the scope of our original contact decomposition. The two cross terms use different power sums. This archive was read after our new contact calculations.
- usesThree interval bipolar spans increased theta to high gamma ratios in paired 60 second SEEG excerpts from 36 patients sci:sha256:e716a2c7f84cd2da498c72ee13ea049873f161c6f2859db82eb36ebef2f91680
We used the fixed 36 patient selection, retained contacts, source locks, EDF reader, contact group code, and observed span spectra. The new comparison uses original contact power sums. The patients are reused.
- usesdoi:10.18112/openneuro.ds004100.v1.1.3
The analyzed excerpts and source metadata came from the OpenNeuro ds004100 version 1.1.3 snapshot.
Cited by
1 publicationPublic catalog entries on Sciscape.
- usesDiagonal controls fitted after reference changes gave different correlations for fixed bipolar signals in 36 SEEG patients
Provided related evidence about contact power and reference choice in the public cohort. It helped define the distinction between measured bipolar signals and reference-dependent contact models.