EEG alpha (for W; α = 8–12 Hz. Panel A), delta (for SWS; δ = 0.5–4.0 Hz. Panel B) and theta (for REMS; θ = 6.0–12.0 Hz. Panel C) power spectra (units, µV²) in rats after the following treatments into dorsal raphe nuclei: Sham, vehicle, URB597, OEA or PEA (30 µg/1 µL; each compound).

<p>Data were calculated over 3 consecutive hours at every time point (Mean ± SEM; * vs. Sham/Vehicle, <i>p</i><0.05).