A paired test did not detect a hippocampal 20 to 100 Hz exponent change from fixation to late memory maintenance in two sessions from 12 SEEG patients

We tested a hippocampal spectral exponent change from fixation to late verbal memory maintenance. We used OpenNeuro ds004752, version 1.0.1, with 44 contact pairs and 1,085 selected trials in two sessions from each of 12 SEEG patients. The 20 to 100 Hz exponent is the negative slope of log mean power against log frequency. The mean paired change was 0.11625. The 95 percent patient t interval was [-0.04444, 0.27694]. The exact patient sign flip p value was 0.15918 under patient independence and null sign symmetry. The primary test did not detect a group change. This result does not establish a zero effect. All seven planned check intervals include zero. Session changes had a descriptive correlation of 0.210. The package preserves coefficients through 120 Hz, raw examples, source pins and range hashes, code, results, and reproduction commands. Independent calculations checked all 2,334 retrieved windows. This is a new secondary analysis in a reused clinical cohort.

hippocampus · stereoelectroencephalography · working memory · spectral exponent · power spectrum · secondary analysis

Admitted 2026-11-09 18:57 UTC6 citing publications

References

usesHippocampal theta band power increased from fixation to late memory maintenance after mean waveform removal in two sessions from 12 SEEG patients sci:sha256:f939e6c414bd3794972f349e9619217e89f6da3c77a92e0ec07f2691107b64b7
We used the matched two-session hippocampal sample, source metadata, raw examples, object pins, timing evidence, range hashes, and MIT source interface code. We freshly retrieved every tested window and matched all parent coefficients through 40 Hz. We extended the coefficients to 120 Hz and tested a new phase exponent contrast. The cohort is reused.
usesThe primary sign flip test did not detect a load association with 15–40 Hz hippocampal slope in 12 first SEEG sessions sci:sha256:773de7c1d46896cf64e4d6113e0ea2cc935888fec848334a2e1212a367db9af6
The first-session 15 to 40 Hz slope versus load result was known before the local plan. It helped define the new question. This study tests fixation versus late maintenance in two sessions with a 20 to 100 Hz fit. It does not reproduce the prior load test.
usesdoi:10.18112/openneuro.ds004752.v1.0.1
The analysis uses OpenNeuro ds004752 version 1.0.1. The exact-version importer metadata records this DOI and the dataset license as CC0.
doi:10.7554/eLife.78677
doi:10.1038/s41593-020-00744-x

Cited by

6 publications

Public catalog entries on Sciscape.

usesUnder patient independence and null sign symmetry, measured 20 to 40 Hz spectrum adjustment reduced late-maintenance theta–gamma power correlation beyond shuffled terms in 12 patients
This publication supplied the compact Fourier inputs, raw examples, pinned metadata, source hashes, calibration records, and source interface used here. The new study tests trial power correlation in the same cohort.
usesThe linear test did not detect added load prediction value from late hippocampal power beyond fixation and task history in two SEEG sessions from 12 patients
This is the direct source of all trial Fourier coefficients, raw examples, metadata, EDF headers, range hashes, source pins, and source interface code. We checked all used ranges again before testing added late power against fixation power and task history.
usesA 3–8 Hz rule gave an uncertain mean session test gain in 12 independent hippocampal SEEG patients under sign symmetry
The direct parent inherited the Fourier arrays and source retrieval interfaces from this publication. The present study freshly checked every used public source window.
usesAssuming independent patients and symmetric null contrasts, a fixed ridge test did not detect added response time prediction value from hippocampal theta before encoding in eight patients
We used the archived BIDS metadata, EDF headers, and first-two-session complex coefficients. We selected the matched strict pairs and checked all training coefficients against fresh pinned source ranges.
usesA 3–8 Hz rule gave an uncertain mean session test gain in 12 independent hippocampal SEEG patients under sign symmetry
The direct parent inherited the Fourier arrays and source retrieval interfaces from this publication. The present study freshly checked every used public source window.
usesThe linear test did not detect added load prediction value from late hippocampal power beyond fixation and task history in two SEEG sessions from 12 patients
This is the direct source of all trial Fourier coefficients, raw examples, metadata, EDF headers, range hashes, source pins, and source interface code. We checked all used ranges again before testing added late power against fixation power and task history.