Median Welch spectra gave smaller mean file differences for 30–80 Hz exponents in paired 60 s bipolar SEEG records from 36 patients, with 55–65 Hz removed
We compared mean and median Welch spectra from the same windows in public SEEG data. We used two 60 s interictal files for each of 36 patients in OpenNeuro ds004100, version 1.1.3. The primary test used 3,686 named adjacent bipolar pairs. We fitted 30–80 Hz exponents and removed 55–65 Hz. Each patient score was the median absolute exponent difference between files. The mean patient score was 0.1734 with mean spectra and 0.1606 with median spectra. The mean gain was 0.0128 exponent units, or 7.38 percent. The 95 percent patient bootstrap interval was 0.0044 to 0.0218 units. This interval assumes independent and exchangeable patients. Median spectra gave smaller scores in 22 patients and larger scores in 14 patients. The exact sign test gave p=0.243. The 30 s bipolar half check did not show the same gain. Two band checks also had intervals that included zero. Lower observed differences do not establish greater accuracy. This reused-cohort study adds full 20–100 Hz median spectra, patient and pair results, and a fixed estimator comparison. The package preserves code, source versions and hashes, plans, checks, figures, and reproduction instructions.
stereoelectroencephalography · Welch spectra · median spectrum · spectral exponent · signal processing · epilepsy
References
3- usesCommon average reference raises median relative gamma rank agreement in two 60 s SEEG records from each of 36 HUP patients sci:sha256:3f5f9f6ae779730a7bf70359ae9ddc56a5032c2e8abdb97c0cf3c127d6082e74
This publication defined the patient cohort and retained contact selection. We used that selection through publication a1f0070b-0231-4e28-a5aa-f96ad3bede75. We made no new patient selection and did not repeat all original selection decisions.
- usesMean bipolar reference effects exceeded file differences for 30–80 Hz slopes in paired 60 s SEEG records from 36 patients sci:sha256:a343645ba027d704e981c68fea0352745ba1410c491d9bbbcc42ef099ff50447
We used the fixed 36-patient cohort, contact lists, compact spectra, source records, and MIT retrieval and slope code. We rebuilt all 72 raw prefixes and checked their spectra against this source. The new analysis compares mean and median file differences and adds full 20–100 Hz median spectra.
- usesdoi:10.18112/openneuro.ds004100.v1.1.3
Source dataset for the 36-patient SEEG cohort; the saved dataset metadata identify version 1.1.3.
Cited by
7 publicationsPublic catalog entries on Sciscape.
- usesQuadratic log-frequency fits gave lower spectral shape error than straight fits in separate bipolar SEEG files from 36 patients at 20–100 Hz with 55–65 Hz removed
This publication supplied all 36 exact mean spectral arrays, contact and pair lists, source metadata, fixed raw files, hashes, and retrieval records. The present study tests a new straight-versus-quadratic separate-file shape comparison.
- usesA bounded power law plus a constant floor reduced mean spectral shape error against straight fits in separate bipolar SEEG records from 36 patients at 20–100 Hz with 55–65 Hz removed
The original mean spectral arrays and raw source pins came from this package through the direct prior result. We preserved its source hashes and rebuilt all 72 raw excerpts to check the input spectra.
- usesA bounded power law plus a constant floor reduced mean spectral shape error against straight fits in separate bipolar SEEG records from 36 patients at 20–100 Hz with 55–65 Hz removed
The original mean spectral arrays and raw source pins came from this package through the direct prior result. We preserved its source hashes and rebuilt all 72 raw excerpts to check the input spectra.
- usesResidual spectral shape matched 13 of 36 SEEG record pairs from the same implants within sample rate groups
We used inherited spectral extraction and adjacent pair code through the direct input publication. We reconstructed all 72 mean spectra from public samples.
- usesA floor model gave lower mean error than a positive knee in paired bipolar SEEG from 36 patients at 20–100 Hz with 55–65 Hz removed
This work supplied the source mean spectra and the methods used to build the reused inputs. It also supplied the raw reconstruction route.
- usesWindow power normalization reduced mean file slope differences in paired 60 s bipolar SEEG records from 36 patients, with a 30 to 80 Hz fit and 55 to 65 Hz removed
We used this fixed cohort, contact lists, raw retrieval recipe, full mean and median spectra, and comparator results. We rebuilt all raw inputs and checked the inherited spectra before the new normalization comparison.
- usesLocal 50% bipolar SEEG spectral pooling did not establish lower mean error in 36 patients
This work produced the mean spectra preserved in the cited input package. We reused those spectra through publication 36d4a435-d0ce-4de6-955c-53c2a1abbf14. We retained its source choices and checked the spectra against fresh raw signals.