Changing the bipolar montage reversed 71 of 296 shaft score orders in four SEEG pulse maps at 20 to 300 ms with fixed contacts
We tested a candidate shaft voltage score in public SEEG data from four patients. The primary maps used the last six selected pulses per patient, from 20 to 300 ms after onset. We kept all 660 contacts and 50 shafts fixed. A chain and a first-contact star each had n-1 outputs on a shaft. Changing this connected digital montage reversed 71 of 296 strict shaft pair orders. The highest shaft changed in three patients. A standard matrix inverse preserved mean square voltage after removal of the shaft mean. All 1,250 graph checks agreed with direct centering to a largest relative error of 5.1e-15. We give a checked tool, four figures, all scores, source hashes, and compact and raw reproduction routes. All 2,157 raw files passed SHA-256 checks. All eight rebuilt data files matched the inherited inputs byte for byte. The sample shares patients and selected events with earlier sci work. The corrected score did not give uniformly better split repeatability. We did not test decoder accuracy or stimulation benefit. The score loses each common shaft waveform. Disconnected graphs and separate edge errors limit the method.
stereoelectroencephalography · SEEG · bipolar montage · shaft voltage score · evoked potentials · signal processing · contact energy · measurement audit
References
6- usesSimulated loss of one reference shaft changed sets of eight SEEG contacts in 6 of 50 tests in four patients sci:sha256:de790cedcb2c1c5c5c46d2c9eb7fb6cb125ba00dfb9787926d43d1bf4b4bd45a
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.
- usesA 50 ms reference change reduced median 70–110 Hz filter order error after simulated shaft removal in four SEEG patients sci:sha256:e9b72840a6a97dda9313bc25b82ff8658c46e1b5890ca5a0714853284b91809a
The fixed event identities and source manifest trace to this source audit through the direct parent. We preserve its event selection and code license. We use the same four patients, not independent patient evidence.
- usesdoi:10.18112/openneuro.ds004977.v1.2.0
The analyzed maps were reconstructed from OpenNeuro ds004977 version 1.2.0; source hash records and the pinned Git commit are preserved in the package.
- doi:10.1016/j.jneumeth.2024.110153
- doi:10.48550/arXiv.2310.00185
- doi:10.1097/WNP.0000000000000792
Cited by
2 publicationsPublic catalog entries on Sciscape.
- usesA contact covariance rule kept SEEG site decisions equal across equivalent bipolar trees in five offline patient tests
Its raw-score montage audit informed the coordinate-change question and limits. We extend the test to refitted covariance distances and later site decisions.
- usesSparse voltage differences corrected one simulated output fault per shaft in four SEEG pulse maps with no added output noise
We used the four compact SEEG maps, fixed pulse selections, source metadata, raw file manifest, and retrieval and extraction code. We rebuilt all eight data files from the pinned raw source and matched their bytes. We added unknown output fault correction, noise tests, and failure controls. These are the same four people, not an independent patient replication.