Fig. 3

Coherence at the delta band increased during correct working memory performance. A Representative sample of filtered LFP signal in the < 4 (Hz) band during correct (blue) and wrong (red). B–D Coherence of OB, mPFC, and vHPC circuit in delta frequency. Within correct trials, coherence between OB, mPFC, and vHPC was raised compared to wrong trials (data averaged over 24 correct trials, 13 wrong trials 2 s pre and 1 s post the RP). Lines and bar graphs indicate the mean of coherence, and shaded regions and error bars represent SEM. Data were analyzed by Wilcoxson-test, n = 6 per group. *p < 0.05, **p < 0.01 and ***p < 0.001. LFP local field potential, OB olfactory bulb, mPFC medial prefrontal cortex, vHPC ventral hippocampus, RP reference point