Links with a shared contact had a larger share of strong local gamma correlations over 60 seconds in 33 SEEG patients
We tested local gamma correlation maps in public SEEG data from OpenNeuro ds004100 version 1.1.3. We retrieved the first 60 seconds of two files in each of 36 patients. The main test included 33 patients with large enough shafts. On each shaft with at least five bipolar channels, we selected the strongest 10 percent of links by absolute correlation. In file A, links with a shared contact made up 88.93 percent of selected links and 24.33 percent of all links. Shafts had equal weight within each patient. Patients had equal weight. The difference was 64.60 percentage points. Its 95 percent patient bootstrap interval was 61.84 to 67.22 points. The difference was positive in 33 patients. File B gave 66.94 points in the same patients. A mathematical control showed that independent contacts can produce negative bipolar correlation through subtraction alone. The control does not identify the cause of observed links. Distance and neural signal mixing remain possible causes. The package contains contact covariance, contact groups with no shared inputs, source versions and hashes, code, tables, figures, and repeat instructions. All source and numeric checks passed. This study did not test a task decoder or brain stimulation.
stereoelectroencephalography · SEEG · bipolar montage · shared contacts · gamma correlation · contact covariance · brain-computer interface
References
6- usesSEEG pairs with onset labels had higher mean high-gamma concentration within shafts over sixty seconds in 32 patients sci:sha256:812aabeb35f542d5113247bfb7846240f02acf6914373bbc71bbfa5d292deec0
We used the fixed 36-patient SEEG cohort, source metadata, source headers, object versions, and source-prefix hashes. We used its 72 mean-power arrays to check new bipolar band variances. We downloaded fresh source prefixes to compute contact covariance.
- usesEight high-gamma SEEG pairs selected with ten seconds had 76.7% mean retention across two interictal records in 36 patients sci:sha256:4947f6220434c945bfb5f749fa56c65ce926ce8b7742925c1b030438e32ad73f
We used and preserved its EDF header reader, contact-name parser, table reader, and HTTP retry code. These functions enabled source retrieval and calibration. The new code computes contact covariance and strong-link shares.
- usesBipolar SEEG pairs with a shared contact have higher mean absolute beta correlation than the nearest pairs with separate contacts in 21 patients sci:sha256:f9206e6467700c572ec5f73a7622ca0b4d27200ce928e5b1393ab3a0c47567c8
This earlier shared-contact beta result helped define the question. Our test uses interictal gamma data from ds004100 and measures the shared-contact share of strong local links. It does not repeat the earlier stimulation-data contrast.
- usesShifts after bipolar subtraction reject 99.55 percent of shared contact beta tests at a five percent threshold with independent contact shifts from eight SEEG records sci:sha256:0abb177603e7c7548a40f6f7816fc99f7e8bc9254e2624889594057a8422d1ed
We used this study to state the independent-contact control and its limits. We computed exact covariance from measured contact variances. We did not repeat its contact-shift test or use a surrogate p value.
- usesdoi:10.18112/openneuro.ds004100.v1.1.3
The study analyzed the first 60 seconds of two interictal SEEG files for each of 36 patients from this exact OpenNeuro release.
- doi:10.21105/joss.01896
The OpenNeuro source README states that MNE-BIDS was used to convert the dataset into BIDS format and cites this paper.
Cited by
11 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 public EDF extraction supplied the source band covariances and receipts with fixed versions. We preserved a source retrieval and rebuild recipe and checked four source records.
- 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 72 contact covariance records, source metadata, frozen retrieval receipts, and source extraction code from this publication. These files enabled new scores between shafts and fresh source reconstruction.
- usesPast amplitude gates changed mean 4–8 versus 4–10 Hz phase agreement by -0.56 percentage points in first files from 36 SEEG patients
This study reuses the 36-patient source cohort, channel metadata, fixed source versions, EDF headers, and source prefix hashes. It retrieves new contact values and makes new theta pair selections. Gamma outcomes were not used.
- usesIndependent contact models with positive gamma variances gave nonzero partial correlations between disjoint channels in complete bipolar chains from 33 SEEG patients
We use its 72 contact covariance inputs, fixed source cohort, channel metadata, EDF headers, source object versions, prefix hashes, extraction code, and source power checks. We test complete chain partial correlations on the same public data and retrieve all source prefixes again.
- usesIn 29 records marked as SEEG, calibration prefixes of 20 seconds increased pair overlap but did not establish a mean power gain
Its S3 version checks and EDF byte-prefix retrieval approach informed the new extractor. This study uses new data and code. Its correlation results were not reused.
- usesMaps fitted to one SEEG record retained 91.9 percent mean gamma energy in another record after common mean removal in 33 patients
Its 60-second band covariance extraction and raw source receipts supplied the signal processing and data provenance.
- usesGeometry normalization left mean gamma voltage dimension below half the contrast count in 33 SEEG patients over two 60-second records
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.
- usesSelection by correlation gave more normalized gamma voltage dimensions than selection by power for four SEEG channels in 33 patients
This study uses all 72 contact covariance inputs, source contact rules, and pinned source provenance from this publication. It extends the strong-link audit to a four-output selection benchmark with test scores in the second file.
- usesOne selected donor gave greater mean gamma error reduction than all donors across files: 32 SEEG patients, penalty 0.1
This publication is the original source of the contact band covariance data reused through the compact input package. It defines the signal windows and frequency bands for the present error measure.
- usesPast theta phase gave no clear gain for 70–110 Hz power forecasts at a 50 ms delay in ridge models from 36 SEEG patients
Its source cohort, pinned EDF metadata, and S3 version receipts are inherited through the immediate input package. They define the selected source scope and enable the fresh byte checks.
- usesOutput phase controls rejected 90.95 percent of shared contact beta tests under independent contact phases from the first two seconds of SEEG in 33 patients
Used the fixed SEEG cohort, contact names and adjacent pairs, and raw audit values to select one fixed quartet per patient. The shared contact effect was already shown in this work.