Fig. 7.

Assessment of the impact of the reference electrode placement on the measurement of power and connectivity. a–j Spectra for power (a–d), coherence (e–g) and wPLI (h–j) for the regions or connections indicated at the top of each panel, shown for standard referencing to the ground screw above the cerebellum (black, WT; purple, KO; as in Figs. 2 and 3) or digitally re-referencing to the reference screw above the frontal cortex (blue, WT; orange, KO). Red lines indicate the boundaries of the analysed frequency bands named by the greek letters at the top. k–m GC in the frequency bands indicated by greek letters and along the directional connections identified by the colour (blue: dHC➔PFC (k), vHC➔PFC (l), vHC➔dHC (m); orange: reverse of the before; display as in Fig. 3a–c). Throughout, shaded regions indicate SEM, and stars indicate the results of RM-ANOVA: black, effect of genotype; green, effect of chosen reference; grey, genotype-reference interaction. In the theta range, the statistics for coherence and wPLI refer to peak theta. *p < 0.05; **p < 0.01; ***p ≤ 0.001