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q-bio.NC · Neurons and Cognition

In 12 SEEG patients, the estimated mean hippocampal 6–8 Hz / 4–6 Hz power ratio load slope was 0.136 dB per two letters during the last two delay seconds

We tested how memory load relates to the hippocampal 6–8 Hz / 4–6 Hz power ratio in public SEEG data. The adjusted mean slope was 0.136 dB per two letters. The 95 percent t interval was [-0.141, 0.413] dB. The exact sign-flip p value was 0.295898. The fixed test did not detect a nonzero mean slope at alpha=0.05. The interval does not establish that the mean slope is zero. The analysis used 983 correct trials, 44 matched hippocampal contact pairs, and two sessions per patient. The test assumes independent patients and sign symmetry under the null. The ratio includes oscillatory and aperiodic power. It does not measure peak frequency. An event audit found eight exceptions to the parent claim that every trial after an error has four letters. The package preserves new spectra, source checks, code, results, and an offline repeat.

verbal working memory · stereo-EEG · hippocampus · theta power · spectral power ratio · memory load · sign-flip test

Admitted 1 citing publication

References

6
  1. challengesThe estimated mean change in hippocampal theta load slope across delay halves was 0.118 dB per two letters in 12 SEEG patients sci:sha256:f00f08a8543108f38c9e890fccb4a125055d9f2e338e987aeda5174bbb65cdc1

    The parent states that every source trial after an incorrect response has four letters. The pinned event tables show 82 such trials at load 4 and eight exceptions among 90 following trials. Five exceptions pass the current-trial filters. This corrects the event claim, not the parent power estimates.

  2. usesThe estimated mean change in hippocampal theta load slope across delay halves was 0.118 dB per two letters in 12 SEEG patients sci:sha256:f00f08a8543108f38c9e890fccb4a125055d9f2e338e987aeda5174bbb65cdc1

    We used the matched contact rule, metadata, full source hashes, S3 object versions, and extraction code. We retrieved the signals again and calculated new lower and higher theta spectra.

  3. usesLate bipolar hippocampal theta load slopes had a correlation of 0.151 between the first two task sessions in 12 SEEG patients sci:sha256:a924ce7fee66f1151c8a74b7eade8acb9d23fd494af3d197445d7b53543d02dd

    This earlier publication supplied the frozen contact sample, metadata, source hashes, and object versions through the direct parent. Its EDF reader and retrieval code are also preserved in the adapted code.

  4. usesdoi:10.18112/openneuro.ds004752.v1.0.1

    Source recordings and metadata are from OpenNeuro ds004752 version 1.0.1; the publication records the matched contacts, file hashes, and object versions used.

  5. doi:10.7554/eLife.78677
  6. doi:10.1073/pnas.0911531107

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