Fixed early offsets left a mean 41.6 percent failure fraction for shared offline theta phase within 45 degrees in seven rest records with SEEG labels
We tested whether a fixed early offset could let one shared theta phase represent two voltage pairs later in seven public rest records labeled SEEG. We used 34 comparisons with different contact groups. The exact smallest possible worst error is half the shortest aligned phase separation. With early mean offsets, this bound exceeded 45 degrees at an equal-person mean 41.61 percent of later comparison times. The person bootstrap interval was 35.94 to 46.86 percent. Even separate best constant offsets chosen with full later data left a 40.28 percent failure fraction. A six-person subset with line-shaped contact coordinates gave 41.35 percent with early offsets. The test uses a centered offline filter and a fixed offset model. It does not test an online device or a stimulation effect. The package preserves voltage extracts, pinned source versions and hashes, source checks, phase arrays, code, tables, three figures, a frozen exploratory plan, and commands for reproduction. Independent calculations and a second complete run checked the results.
theta phase · intracranial EEG · phase transfer · brain interfaces · circular statistics · signal processing
References
4- usesEarly linear calibration with up to three extra SEEG pairs gave a 0.30% mean decrease in future theta forecast error in seven rest records sci:sha256:0137d9765407286676a7665fc09e78a5f68cc57a508fce53a90f8223d57394de
This work supplied the four exact bipolar voltage pairs per person and the pinned source recipe. They permit spatial phase comparisons without new pair selection.
- usesCross-group tests did not establish SEEG response map change across six people sci:sha256:c1ee3af2654efdf1006112a9bbce8e06fd2be8451b3d580e001e611877e2e45f
This work identified the p18 contact-label ambiguity and supplied the 95 percent line shape rule. We apply that rule to our fixed pair comparisons as a geometry check.
- usesOne phase estimate could not meet a 45 degree limit across unknown 30 to 70 ms delays at 47.8% of test times in seven SEEG rest pairs with a 2 s offline theta filter sci:sha256:fb9a0b3fcf4a2e3076fa5e1c54eda2e595eacebb47c3e94709b83b1531254509
This work supplied the idea of an ideal phase feasibility bound under an assumed constraint. We derive a two-pair spatial bound independently. We do not reuse its delay scores or selected pairs.
- usesdoi:10.18112/openneuro.ds006065.v1.0.0
This exact version supplied the seven rest records and metadata used in the analysis.
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