Geometry normalization left mean gamma voltage dimension below half the contrast count in 33 SEEG patients over two 60-second records
We tested whether adjacent contact subtraction explains low gamma voltage dimension in public SEEG data. We used 402 eligible shafts in 33 patients from OpenNeuro ds004100 version 1.1.3. Each patient supplied two 60-second interictal records. Gamma used 70 to 109 Hz Fourier bins. A contact metric removed the geometry of the subtraction operation. The mean dimension fraction was 43.76% in record A and 45.49% in record B. Patient bootstrap 95% intervals were 40.95% to 46.65% and 42.91% to 48.10%. The ordinary adjacent-pair means were 47.09% and 47.81%. The exact equal independent-contact control had a contact metric dimension fraction of 100%. The contact metric preserved eigenvalues under invertible changes of the same output basis. All 880 connected-group records passed numerical checks. A separate reader rebuilt one public source prefix and matched gamma covariance to numerical precision. A fresh process reproduced all new numeric results. The package contains covariance inputs, code, source receipts, a proof, tables, and figures. These scores describe voltage variance concentration. They do not count neurons or show better BCI decoding or stimulation.
stereoelectroencephalography · gamma band · participation dimension · contact covariance · bipolar subtraction · brain-computer interfaces
References
4- usesLinks with a shared contact had a larger share of strong local gamma correlations over 60 seconds in 33 SEEG patients sci:sha256:77fdc837b559f7b809e6d187400a439fa1d2e22314b585079cbb13cc1ef1b002
We used its checked 60-second contact band covariance, fixed cohort, source metadata, hashes, and raw retrieval code. These inputs enabled the new gamma participation dimension analysis in 33 patients.
- usesA contact covariance rule kept beta distances equal across redundant pair layouts in 35 SEEG records with consistent contact differences sci:sha256:12610080f0a52b085aa0f0a96d3ef097c0ad3cbc25a687f0e866822752c16b04
We used its orthonormal contact-contrast formulation to define the same-space basis assumptions and related method scope. The new endpoint is participation dimension in ds004100, rather than its regularized beta covariance distance benchmark.
- usesdoi:10.18112/openneuro.ds004100.v1.1.3
Source recordings used for the 33-patient SEEG analysis; the publication records version 1.1.3 and the source metadata records this version-specific DOI and CC0 license.
- doi:10.3389/fnsys.2016.00011
Background source for the established participation-dimension measure used to quantify covariance variance concentration.
Cited by
3 publicationsPublic catalog entries on Sciscape.
- usesEqual beta and high gamma weights raised mean smaller band retention over gamma maps at the same output count in 33 SEEG patients
Its compact contact covariance files and source records underlie the imported inputs. We repeated the 508 file hash checks inherited from this work.
- usesA contact metric ridge kept gamma scores between shafts unchanged across two full bipolar layouts on the same contacts in 32 SEEG patients
This study used the contact metric G=D D^T and the orthonormal contrast interpretation from this publication. It applied that geometry to a ridge penalty for canonical scores between shafts.
- usesMaps fitted to one SEEG record retained 91.9 percent mean gamma energy in another record after common mean removal in 33 patients
We imported its 72 contact covariance files and source metadata. These inputs permit the separate-record map test.