Fig. 6: Delta band activity and behaviour.

a Example of LFP power spectral density (PSD) in AC for three behavioural states. b Scatter plots showing delta band (0.5–4 Hz) PSD during sleep posture vs active states (including DMN and Exploratory states) in the four brain areas. Symbol colours denote different animals, see the legend. c Average magnitude of the difference between delta band PSD during sleep posture and two active states (DMN and Exploration). d Average delta amplitude of each epoch in chronological order throughout one session. e Warren–Sarle test of bimodality showing the delta amplitude distribution of sleep posture epochs was bimodal for the example session. (Warren–Sarle coefficient = 0.83). f Across the datasets, the percentage of sleeping posture in epochs with high delta activity occurred. Error bars reflect SD.