Fig. 5

Cross-frequency coupling between OB, mPFC, and vHPC reduces enhanced during the correct trial performance. A Polar distribution. B Color map of gamma mPFC power (50–80 Hz) and delta phase cycle in vHPC. The green arrow denotes the mean resultant vector length. C During correct trials, animals show higher mean resultant vector length values as an indicator of the vHPC delta phase and mPFC gamma power coupling. D–F Like what is described in A–C, but for the delta phase of OB and gamma power in mPFC; the delta phase more significantly modulates gamma power in mentioned regions during correct trials than control. G Polar distribution. H Color map of OB gamma power in along with the vHPC delta phase. I Phase-power coupling in the vHPC–OB circuit increased within correct working memory performance. Data were analyzed by Wilcoxson-test, n = 6 per group. *p < 0.05, **p < 0.05. OB olfactory bulb, mPFC medial prefrontal cortex, vHPC ventral hippocampus