SWR events are locally generated and maintained within the telencephalon. Basic properties of SW events between whole-brain and de-tectomized preparations. A, Top, Representative electrode placement positions in the ADL of whole-brain preparations (left) and de-tectomized preparations (right). LFP recordings were done independently in either whole-brain or de-tectomized preparations. Bottom, Representative traces with LFP, SW, R (ripple), and R root mean square (RMS). Frequency spectrogram is also shown. B, A representative trace from a whole-brain preparation showing LFP, SW, SW RMS, R, and R RMS together with the spectogram frequency for better ripple frequency visualization. C, Representative SWR complexes from a whole-brain recording showing an SW containing a single ripple (left), one with subthreshold (middle), and one with a ripple doublet. D, Quantification of SW abundance (n_{whole brain}= 18; n_{de-tectomized}= 17); E, amplitude (n_{whole brain}= 16; n_{de-tectomized}= 14); and F, duration (n_{whole brain}= 18; n_{de-tectomized}= 17) between whole-brain and de-tectomized recordings. G, Quantification of the percentage of SW events with at least one embedded ripple (n_{whole brain}= 10; n_{de-tectomized}= 17). ROUT test was performed for each quantification. Unpaired t test and Mann–Whitney tests were performed. *p < 0.05, **p < 0.005, ***p < 0.0005.