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. 2021 Jun 18;7(25):eabf7144. doi: 10.1126/sciadv.abf7144

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Copyright © 2021 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).

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Fig. 3 — (A) Field potentials were recorded from iEEG electrodes in bilateral hippocampus (HC; red) and in a control region (LTC; cyan). (B) Example low- and high-frequency theta oscillations recording from the hippocampus. (C) Oscillation detection revealed prevalent low- and high-frequency theta oscillations within the hippocampus and LTC. (D) In hippocampus, theta prevalence differed significantly [P < 0.05, false discovery rate (FDR)–corrected] preceding (~500 to 300 ms) and following (~500 to 700 ms) revisitation fixations (time = 0 indicates fixation onset). (E) This relationship was more robust for higher- than lower-frequency theta oscillations. (F) Within LTC, no significant differences in theta prevalence were detected, leading up to revisitation fixations. Shaded regions denote 1 SEM across N = 6 participants.