Sample medians across five pulses created 70 to 110 Hz power after 4 to 30 Hz Fourier projection at 83 SEEG sites in eight people
A sample median created 70 to 110 Hz power at all 83 tested sites. Each input first received an exact 4 to 30 Hz Fourier projection. The data came from five early SEEG pulses per site in eight people with epilepsy. The scored window was 20 to 500 ms after stimulation. The equal-person power ratio was 0.0793 (0.0510 to 0.1093) percent. The interval is a descriptive 95 percent bootstrap interval. The denominator was the mean power of the five projected input pulses. The mean, geometric median, Fourier median, and final projection controls kept gamma at rounding error. The same effect occurred before stimulation and with three other input bands. The later-pulse test did not show a clear prediction gain for the median methods. This study extends a prior channel-reference audit to the pulse axis in electrical stimulation data. The package contains data, code, three figures, source hashes, retrieval recipes, and replay checks. This offline test does not measure brain-interface benefit or estimate an artifact fraction in original gamma.
sample median · stereoelectroencephalography · electrical stimulation · signal processing · gamma power · Fourier projection · brain-computer interface
References
6- usesAn offline median reference created 70–110 Hz voltage from 1–30 Hz SEEG inputs in eight people sci:sha256:404621c2f52f9069133facf722ec222cc635acccf0730258cb13e16a7d9e2181
Its channel-reference audit supplied the idea of a Fourier input band with zero gamma power. This study applies that control to a median across five pulses in electrical stimulation SEEG. It extends the tested axis and source dataset; it does not claim the general median frequency mechanism as new.
- usesContact medians changed 20 to 500 ms bipolar SEEG templates under two voltage references at 83 sites in eight people sci:sha256:2c6e5aa829391c280e08aaf3531691e8ae03629674f83cb6f3d20e5cb0f3b3e7
This study uses its exact source windows, 83-site cohort, pulse rows, contact choices, source records, and retrieval code. It tests a median across pulses after a fixed Fourier projection. The new source checks repeat the extraction for all eight people.
- usesA geometric median reduced 20–500 ms SEEG error with one simulated gain error among five calibration pulses in eight patients sci:sha256:c37805e37f6922e0de8e20f0231c72f98687698645324f2c0c6261e9d3ce9010
Its five-pulse geometric median supplied a whole-waveform control for this test. This study tests frequency support, coordinate behavior, and later-pulse error at one selected readout per site. It does not repeat the simulated gain-error test.
- usesdoi:10.18112/openneuro.ds004696.v1.0.1
Source voltage data and metadata for the 83-site SEEG cohort.
- usesdoi:10.1523/JNEUROSCI.2201-22.2023
Source experiment for the OpenNeuro HAPwave data.
- doi:10.1073/pnas.97.4.1423
Method reference for the modified Weiszfeld geometric-median fit.
Cited by
2 publicationsPublic catalog entries on Sciscape.
- usesA contact metric kept geometric SEEG templates and site labels fixed across full layouts of consistent contact differences in four records
We adapted its whole-vector geometric median solver under GPL-3.0-or-later. It supplied the numerical template method. We did not use its HAPwave voltage data.
- usesA fixed contact norm preserved five-pulse SEEG medians across three connected layouts from the same contact voltages in eight patients
This study uses the exact three-contact early windows and fixed A-B later windows at 83 sites. It also uses the contact selection, source metadata, retrieval code, and adapted median solver. All ten input data files match the cited archive hashes. The new study does not use its Fourier projections.