Fig. 6

After eliminating potentially confounding variables, the frequency profile of unit entrainment remains inconsistent across subjects. We carried out the same analysis as in the previous figure except that we only included cells recorded in female rats that performed the foraging task and only considered recording sites for which data was available in at least three rats. We correlated the entrainment values at each frequency for all available cell pairs in four classes: within each rat and within structure (WR-WS), within each rat and between structures (WR-BS), between rats and within structures (BR-WS), or between rats and between structures (BR-BS). We did so separately for cortical (a-c) and subcortical (d-f) neurons, and in three conditions: during performance of the foraging task (a, d), during QW (b, e), and SWS (c, f). We provide the average ± SEM Pearson correlation coefficients (SEMs are so low they are not visible). Number of cortical cell pairs for the foraging task: WR-WS 12,285, WR-BS 11,446, BR-WS 5,391, BR-BS 11,328. Number of cortical cell pairs for QW and SWS: WR-WS 20,536, WR-BS 17,714, BR-WS 9,607, BR-BS 19,622. Number of subcortical cell pairs for the foraging task: WR-WS 206,575, WR-BS 42,016, BR-WS 176,355, BR-BS 188,035. Number of subcortical cell pairs for QW and SWS: WR-WS 15,181, WR-BS 11,955, BR-WS 6,724, BR-BS 13,566. A 2 × 3 × 2 × 2 ANOVA revealed significant effects of brain structure, behavioral state, unit-region relationship, and unit-subject relationship (F ≥ 7466.75; p < 0.0001) as well as significant interactions between all these variables (F ≥ 143.13; p < 0.0001). Expectedly, post-hoc rank-sum tests revealed that in four of the six cases, the average correlation WR-WS was significantly higher than WR-BS (p’s < 0.0028 or 0.5/18). However, indicating that the frequency profile of unit entrainment is generally inconsistent across subjects, in four of the six cases, the average correlation BR-WS was significantly lower than WR-BS (p’s < 0.0028 or 0.5/18). Furthermore, differences between correlations BR-WS versus BR-BS had a generally lower magnitude and inconsistent polarity. Abbreviation: ns, not significant.