Fig. 3.

Regional and state specificity of modulation of gamma subbands by either theta or respiration. Theta and RR power (A) and strength of theta-γ₁, theta-γ₃, and RR-γ₂ coupling (B) during immobility (Imm.) and exploration (Exp.) are shown (mean over animals: *P < 0.05, **P < 0.005, and ***P < 0.0005; Wilcoxon signed rank or paired t test in A and Mann–Whitney or unpaired t test in B; n = 7–10). (C) Mean modulation ratios (Methods and main text). Positive ratios reflect modulation by theta, and negative ratios reflect modulation by RR. Asterisks show significant differences from zero (**P < 0.005 and ***P < 0.0005; one-way ANOVA and Dunnett’s multiple comparisons test; n = 7–10). In A–C, error bars represent SEM.