Simulated loss of one reference shaft changed sets of eight SEEG contacts in 6 of 50 tests in four patients
We tested loss of one shaft from an average reference in public SEEG data from four patients. The source was OpenNeuro ds004977 version 1.2.0. Each site had 12 checked pulses. The main map used the last six pulses at 20 to 300 ms. Both rankings used the same remaining contacts. The set of eight highest RMS contacts changed in 6 of 50 shaft tests. The equal patient mean replacement was 2.175%, compared with 0.999% for 1000 random reference losses of the same size per shaft. All four patient differences were positive. The exact two-sided sign-flip value was 0.125. The largest loss replaced three of eight contacts. A score gap bound certified an unchanged set in 26 tests; all 26 direct calculations agreed. A fixed low-RMS reference quarter had mixed patient results. The package preserves exact voltage means, all random masks, three figures, source hashes, code, and raw retrieval instructions. All source and repeat checks passed. This is an exploratory audit of fixed voltage maps. It does not establish neural connectivity or online interface benefit.
stereo-EEG · SEEG · common average reference · reference loss · contact selection · evoked potential · signal processing · four-patient study
References
3- usesA 50 ms reference change reduced median 70–110 Hz filter order error after simulated shaft removal in four SEEG patients sci:sha256:e9b72840a6a97dda9313bc25b82ff8658c46e1b5890ca5a0714853284b91809a
Used the fixed public event subset, source metadata, raw retrieval manifest, and retrieval code. The new study extracted after-pulse voltage from raw MEF files and tested contact-set changes. The two studies use the same four patients.
- usesdoi:10.18112/openneuro.ds004977.v1.2.0
The analyzed SEEG recordings are from OpenNeuro ds004977 version 1.2.0; source hashes and version are recorded in the publication.
- doi:10.1016/j.jneumeth.2024.110153
Cited by
3 publicationsPublic catalog entries on Sciscape.
- usesChanging the bipolar montage reversed 71 of 296 shaft score orders in four SEEG pulse maps at 20 to 300 ms with fixed contacts
We reused four compact voltage maps, pulse selection tables, extraction and retrieval code, source metadata, and raw hashes. We rebuilt all eight data files from the pinned public raw source and matched their bytes. This work tests connected bipolar graphs with fixed contacts and shares the four patients with the parent.
- usesTwo six-pulse groups did not establish excess shared SEEG voltage product at 20 to 300 ms in four people
Used exact split maps, fixed pulse rows, source metadata, raw hash manifest, and adapted retrieval, extraction, and snapshot-check code. Rebuilt all maps from fresh raw files. The new work tests shared and contrast voltage products with before-pulse controls. Both studies use the same four people.
- usesPatient median beta score changes were below 0.006 after removal of one shaft from the average reference in four fixed SEEG records
Used its related reference shaft-removal test to define the distinct study scope. That study tested evoked voltage contact ranks. This study tests pre-pulse spectral measures on the same reused cohort and does not claim independent replication.