One bipolar bridge gave nonzero cross-shaft partial correlation in eight SEEG models with uncorrelated contacts and finite positive variances
The study tested whether one added bipolar channel can change partial correlation between SEEG shafts. It used 48 fixed sections from eight subjects in OpenNeuro ds004473 version 1.0.2. A proof extended a path result to trees with branches. Under zero cross-contact covariance and finite positive contact variances, one bridge made every old cross-tree partial correlation nonzero. The new cross-block had rank one. The bridge did not change ordinary correlation between old channels. For 412 target pairs, beta powers gave a mean patient median magnitude of 0.185. Shrinkage reduced this value to 0.032 at 0.1 and 0.00042 at 0.5. Phase controls supported the calculation. With recorded covariance, the same bridge gave a mean patient median absolute change of 0.040. This observed change did not identify a brain source or a montage artifact. All 48 fresh source ranges reproduced the saved spectra exactly. The package preserves the proof, source pin, spectra, code, results, and reproduction instructions.
partial correlation · SEEG · bipolar montage · conditioning set · tree covariance · signal mixing
References
6- usesIndependent contact phase controls give absolute beta correlation above 0.30 on most shared-contact bipolar edges in eight SEEG recordings sci:sha256:b140aa736f880707f1f76cc167a2c578bc877c6ea56ddc6ca389a0996300da69
This earlier study produced the contact spectra and source retrieval records used through the direct parent. This run retrieved all 48 pinned raw ranges and reproduced those spectra exactly.
- usesMasking shared contact edges leaves nonzero partial correlation in consecutive bipolar SEEG paths with four or more independent contacts and finite positive variances sci:sha256:c84d67b089ee3c621e27306c213321c29bd9efa502f59d21c770bb6c332532e5
The study used the path proof, 48 public SEEG spectral arrays, contact montages, and pinned source records. It extended the proof to trees with branches and added one bridge between shafts.
- usesdoi:10.18112/openneuro.ds004473.v1.0.2
The study used 48 fixed sections from this exact OpenNeuro dataset version; pinned source ranges reproduced the archived spectra.
- doi:10.1088/1741-2552%2Facae0a
- doi:10.3389/fnsys.2015.00175
- doi:10.1162/jocn_a_01580
Cited by
1 publicationPublic catalog entries on Sciscape.
- usesOne exact bipolar loop gives residual partial correlation magnitude one with positive definite original covariance
We used its 48 Fourier files, contact map, source metadata, pinned range manifest, and source reader. These inputs enabled the exact-loop SEEG test and source checks.