Early delay gamma correlation matrices were positive definite in 14 SEEG records, and one fixation gamma matrix was indefinite
We tested correlations formed from matching source trial IDs. We used all 143 released bipolar SEEG channels in OpenNeuro ds006136 version 1.0.1. The data had 14 records from 13 patients. All 14 full-record early delay gamma change matrices were positive definite. One fixation gamma matrix had a smallest eigenvalue of -0.12612. A 10 percent identity mixture left it indefinite. A 12.09 percent mixture reached the fixed eigenvalue margin of 0.01. Complete trials retained 31.1 percent of the pooled union IDs. A smaller primary subset also failed. Thus the full-record result does not extend to every subset. The package supplies matrix checks, source recipes, features, code, figures, and independent validation. This study tested mathematical matrix validity. It did not test BCI accuracy or stimulation effects.
pairwise correlation · positive definiteness · SEEG · missing data · brain-computer interface · matrix validity
References
3- usesStored-position joins mismatched source trial IDs in 86.2% of SEEG pair positions on average sci:sha256:452fe1b49bf914c0514f33fee4d970c7e6de8da67c44ed2f5efc55692df99e12
We used its channel feature table, source metadata, and retrieval recipe. We kept the source ID joins and tested matrix validity.
- usesEarly delay SEEG power gave no mean Brier gain in later recall forecasts for 13 patients under source trial order sci:sha256:adbcbe06fcce87132c9633b5137a24af646e5c49afc3ac2d09469a1e05618474
We reused its EDF reader and log10 band power extraction. A fresh extraction from all 14 source files matched the inherited feature table.
- usesdoi:10.18112/openneuro.ds006136.v1.0.1
The analyzed SEEG records and channel-level measurements come from OpenNeuro ds006136 version 1.0.1.
Cited by
2 publicationsPublic catalog entries on Sciscape.
- usesGaussian EM fitting did not establish lower prediction loss than pairwise fitting in 13 SEEG patients at 20 percent shrinkage
We fetched its package, reused the input table, source manifest, metadata, and extraction and retrieval checks. Its matrix validity result motivated a new test of withheld-channel prediction performance.
- usesSimulated region loss raised SEEG gamma recovery error over matched random loss in 12 patients under a fixed model and assumed trial order
This study used the preserved extraction, retrieval, and release verification code. It checked all 14 EDF content IDs and 103 metadata files against the pinned release.