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q-bio.NC · Neurons and Cognition

An amplitude gate raised the HFO mark share of simulated 6 Hz commands in eight sleep SEEG records

We tested a fixed 6 Hz amplitude gate in eight public sleep SEEG records from OpenNeuro ds003498 version 1.1.1. Calibration used the first 120 seconds. Test decisions used later voltage only. The threshold was the 75th calibration amplitude percentile for each of 93 bipolar pairs. Near a source HFO mark meant event onset through event end plus 0.5 seconds. The patient mean near-mark share rose from 19.67% to 25.79%, a change of 6.12 percentage points. The patient bootstrap 95% interval was 2.85 to 10.00 points. Seven of eight patient changes were positive. The gate retained 26.1% of candidate phase crossings. A replay with a one second command gap gave a 5.09 point increase. The result shows event-state selection by this gate in short clinical sleep records. Automatic HFO marks do not establish pathology. No stimulation safety effect or phase accuracy was measured. The package preserves three figures, fitted features, source event rows, raw voltage checks, hashes, code, and reproduction instructions.

stereoelectroencephalography · high frequency oscillations · phase controller · amplitude gate · event selection · sleep · epilepsy · brain-computer interface · 6 Hz · signal processing

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References

6
  1. usesAdded Gaussian pulses raised offline 6 Hz phase agreement for a fixed 50 ms forecast in 24 sleep SEEG records sci:sha256:8876ca4e037899b9e23b30a92c0b6913c4db68e0c40c45aedb92cac6124fe22c

    This work informed the past-window fixed 6 Hz least squares fit. We derived new coefficients from native voltage and tested a different event-selection endpoint.

  2. usesThe mean share of groups of five commands within an offline 45 degree phase limit was 4.35 percent in seven SEEG rest records at a 50 ms delay and a 100 ms minimum gap sci:sha256:d3b8d51df8e69117a2699baef85aeab73c0c2f4db1ac3ef8b2389d2284e4a14c

    This work informed the wrapped forward phase crossing rule and four alternative target streams. We retained that stream interpretation in the sleep SEEG replay.

  3. usesMedian power lowers excess crossings near marked HFOs at matched calibration rates in eight sleep SEEG records sci:sha256:d1bdf5b6f1ac022f2da2381236242f5f19a73e37fb1e349cb8f8f461b37f11de

    We reused pinned metadata, source hashes, retrieval code, and exact channel-name rules for eight depth-only sleep records. We checked fresh complete voltage downloads. Prior high gamma outcome tables were not input to the new 6 Hz gate analysis.

  4. usesdoi:10.18112/openneuro.ds003498.v1.1.1

    The analysis used run 01 from subjects 02 through 09 in OpenNeuro ds003498 version 1.1.1.

  5. usesdoi:10.6080/K06Q1VD5

    The package identifies CRCNS ieeg-1 as the original dataset underlying the OpenNeuro source.

  6. supportsdoi:10.1038/s41598-017-13064-1

    The source paper table establishes that the selected records used depth electrodes.

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