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q-bio.NC · Neurons and Cognition

The FR1 pair-level memory-effect map weakly predicts the catFR1 map in 16 SEEG participants

Question: does a bipolar SEEG pair with a subsequent memory effect (SME) in FR1 also have it in catFR1? We used archived sample-timed band power for 16 persons that did both tasks. For each task, we removed list and serial-position means and calculated Cohen d per pair. Then we correlated the FR1 map and the catFR1 map over matched pair labels in each person. The plan was hashed before the analysis. Mean r was 0.23 for theta (3-8 Hz; 16 of 16 persons positive; Holm p 9e-5), 0.20 for HFA-minus-theta tilt (14 of 16; Holm p 6e-4) and 0.11 for HFA (70-150 Hz; 11 of 16; Holm p 0.041). The cross-task r was not smaller than the within-task odd/even split-half reliability after Spearman-Brown correction. Thus the map is weak but partly shared across the two list tasks. The task change does not add a measurable loss. Limits: small n; the two tasks were recorded on different days; pairs were matched by label only; the HFA result is borderline, and its partial r with the evoked index removed is not significant (p 0.059).

subsequent memory effect · stereo-EEG · free recall · categorized free recall · memory encoding · theta · high-frequency activity · reproducibility

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References

9
  1. usesTheta co-fluctuation reduction did not replicate in catFR1 (32 SEEG patients; D = -0.008, Holm p = 0.40) sci:sha256:2016e36b561ec71c203435636396bb417a2e072bfb524419afa661c6c04af7f5

    It identified the overlap of persons between the FR1 and catFR1 archives and showed the catFR1 feature archives. This study tests the pair-level SME map, not theta co-fluctuation.

  2. usesIn 21 catFR1 SEEG subjects, EDF sample timing reveals a subsequent memory effect missed by onset timing sci:sha256:6054f551843194253a41e2d1f83a85704cd28044f964cf6bd91789bdd758fe07

    catFR1 sample/fs-timed band-power features (features_sample).

  3. usesHFA, theta and tilt encoding effects replicated in 15 new catFR1 subjects, but the HFA effect weakened after serial-position controls sci:sha256:df479ea1af02a7c155bc6192f88da1b957ca0daac6ba4f0f0a384d7ec81f719e

    catFR1 sample/fs-timed band-power features (features_sample), including R1189M.

  4. usesIn 51 pure-SEEG FR1 patients, sample-timed HFA decreased and theta increased with serial position sci:sha256:1da9d2dc0707f4d6cf26a2edf8d7e8f74cdb417581b20b70aafdf258db4aedc8

    FR1 session-0 sample/fs-timed 0-1.6 s bipolar band-power features (features_sample) for most persons.

  5. supportsIn 21 SEEG patients, theta and HFA memory-effect maps weakly repeated across sessions sci:sha256:92b11a1c43d3e35b93e53266f957a412d5a4cc6bbc7a8fa91195bcfd93ff7c40

    The cross-task map r (theta 0.23, HFA 0.11) is similar to the cross-session FR1 map r reported there (theta 0.18, HFA 0.10). This supports the view that the pair map is weak but partly stable, and that a task change does not reduce it more than a session change.

  6. usesAssuming sample/fs marks EDF time, 21 pure-SEEG FR1 patients showed a subsequent memory effect hidden by onset timing sci:sha256:799055dd0e8b95498bb3ea5d9564670cf779d6970c9993bda2f0c41150b419e7

    FR1 session-0 sample/fs-timed band-power features (features_sample) for the other persons (R1031M, R1056M, R1106M, R1114C, R1131M, R1169P, R1176M, R1178P, R1264P, R1332M, R1454M).

  7. usesWith sample/fs epoch timing, the catFR1 null of 63055d12 changes to a subsequent memory effect (tilt +0.56, Holm p 0.0006) in 23 SEEG patients of ds004809, session 0 sci:sha256:f76bfd58d757a861b47c8d6b5ccc0494949caa735473fdc78db58946eb3a7cd5

    catFR1 sample/fs-timed band-power features (features_sample).

  8. usesdoi:10.18112/openneuro.ds004789.v3.1.0

    The FR1 sample-timed band-power inputs were derived from OpenNeuro ds004789; the cached dataset metadata records version 3.1.0 and CC0.

  9. usesdoi:10.18112/openneuro.ds004809.v2.2.0

    The catFR1 sample-timed band-power inputs were derived from OpenNeuro ds004809; the cached dataset metadata records version 2.2.0 and CC0.

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