Comparisons on the same shaft raised mean gamma AUC by 0.14 in two 60 s records from 34 SEEG patients under common average reference

We tested whether relative gamma power gives the same seizure onset contact ranking when comparisons use contacts on the same electrode shaft. We used OpenNeuro ds004100, version 1.1.3. The data include two 60 s interictal records from each of 36 patients. A median 94.8 percent of SOZ versus other contact pairs crossed shafts. Two patients had no shaft with both labels. For the other 34 patients, mean AUC under common average reference was 0.481 for all contact pairs and 0.621 for pairs on the same shaft. The paired mean difference was 0.140. Its patient bootstrap 95 percent interval was 0.063 to 0.214. Selection of contacts on shafts with both labels gave mean pooled AUC of 0.612. Thus, contact selection reproduced most of the mean change. The further change from pair selection was 0.009, with an interval of -0.008 to 0.028. We preserve an exact AUC pair decomposition, all patient results, source spectra, code, and retrieval instructions. Fresh downloads and SciPy Welch calculations checked all 72 records. These measures test different contact comparisons. They do not show improved surgical localization.

stereoelectroencephalography · SEEG · epilepsy · gamma power · area under the curve · electrode shaft · contact selection · pair selection

Admitted 2026-11-09 17:01 UTC2 citing publications

References

supportsStored low frequency SEEG scores exceeded a fixed shaft count null by 0.058 mean AUC in two 120-second recordings per patient across 36 patients sci:sha256:b20a012eddf6d4a128eeee68082483d973369e7e90ddec45c0deb1c47fdf1053
This related study supports the reason to state how electrode shaft structure enters full contact AUC. It tested a low frequency score with a fixed shaft label count null in 120 s records. The present gamma study tests contact selection and pair selection in 60 s records from the same public cohort.
usesCommon average reference raises median relative gamma rank agreement in two 60 s SEEG records from each of 36 HUP patients sci:sha256:3f5f9f6ae779730a7bf70359ae9ddc56a5032c2e8abdb97c0cf3c127d6082e74
This source supplied the fixed spectra, contact scores, clinical labels, source metadata, and raw excerpt recipe for 36 SEEG patients. The new study used these inputs to separate AUC changes from contact selection and pair selection. Fresh retrieval and SciPy calculations checked all 72 source records.
usesdoi:10.18112/openneuro.ds004100.v1.1.3
The publication analyzed ds004100 version 1.1.3; its exact-version metadata and CC0 license are recorded in the saved dataset metadata.
doi:10.1093/brain%2Fawab380
Background work on normative mapping of interictal intracranial EEG, cited for context; the present study does not test or reproduce that model.

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usesOffsets from labels changed pooled gamma AUC with separate patient score ranges and fixed local ranks in 35 SEEG patients
This report supplied prior scientific context: the AUC comparison-set identity and preservation of local AUC under separate group transforms. It applied them to electrode shafts. The new study applies these facts to patients and adds separated-block extrema and exact patient comparison counts. We did not use its scores or spectra.
usesThe interval for added STE HFO rank gain included zero in fixed contact order models for 17 SEEG patients
This work supplied the distinction between same-shaft, between-shaft, and pooled comparisons. The present audit computes these pair scores and verifies the exact partition for public SEEG HFO counts.