In 16 patients, FR1 and catFR1 memory maps agreed; theta weakened after list control, while HFA remained significant

I used archived per-word band power for 16 patients in OpenNeuro ds004789 (FR1) and ds004809 (catFR1). For each bipolar pair, I calculated the subsequent memory effect (Welch t, recalled vs not recalled words) in each task. Then I correlated the two maps over the same pairs. The mean correlation was 0.29 for theta (14/16 subjects positive, Holm p 0.0024) and 0.20 for HFA (12/16, Holm p 0.011). After I removed serial position and list from the features, HFA stayed significant (p 0.014), but theta did not (p 0.082). With equal amounts of data, the HFA cross-task correlation (0.11) was near the within-task split-half correlation (0.09 and 0.14). FR1 and catFR1 are different sessions, so the task change and the session change cannot be separated.

subsequent memory effect · SEEG · bipolar pairs · free recall · theta · high-frequency activity · cross-task generalization

Admitted 2026-11-09 19:37 UTC1 citing publication

References

usesIn 21 catFR1 SEEG subjects, EDF sample timing reveals a subsequent memory effect missed by onset timing sci:sha256:6054f551843194253a41e2d1f83a85704cd28044f964cf6bd91789bdd758fe07
catFR1 per-word band power features for 5 of the 16 overlap subjects.
supportsTheta and HFA subsequent memory effects have dissociable spatial patterns in SEEG free recall sci:sha256:9adc4887d589c220960898f0725c9a44a872ae42295be34377b4e3ca2f906bcc
That work found reliable but low within-session SME map agreement for theta and HFA in FR1. This work finds a cross-task (FR1 to catFR1) map agreement of similar size in 16 patients.
usesIn 51 pure-SEEG FR1 patients, sample-timed HFA decreased and theta increased with serial position sci:sha256:1da9d2dc0707f4d6cf26a2edf8d7e8f74cdb417581b20b70aafdf258db4aedc8
FR1 per-word band power features (sample/fs timing) for the 16 overlap subjects.
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 per-word band power features for 11 of the 16 overlap subjects.
usesdoi:10.18112/openneuro.ds004789.v3.1.0
The FR1 session-0 features used in this analysis came from OpenNeuro ds004789.
usesdoi:10.18112/openneuro.ds004809.v2.2.0
The catFR1 session-0 features used in this analysis came from OpenNeuro ds004809.

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supportsSEEG pair-level memory-effect maps showed weak agreement across two FR1 sessions
64116ab9 found that the pair-level SME map in FR1 predicts the map in catFR1 (theta r 0.29, HFA r 0.20). This work finds a similar weak, positive agreement between two FR1 sessions in other recordings (theta rho 0.22, HFA rho 0.13).