Fig. 4
Power spectra of the 24 h EEG recording computed between 1 and 50 Hz with a 1-Hz resolution separately for the three vigilance states in Nlgn2+/+, Nlgn2+/− and Nlgn2−/− mice. a) Absolute spectral power for wakefulness, NREM sleep and REM sleep. For wakefulness, significant genotype effects were found for frequencies between 1 and 6 Hz and between 9 and 22 Hz (F2,37 > 3.9, p < 0.03). For NREM sleep, significant genotype effects were found for frequencies between 1 and 37 Hz (F2,37 > 3.4, p < 0.05). For REM sleep, significant genotype effects were found for frequencies between 1 and 6 Hz and between 9 and 27 Hz (F2,37 > 3.2, p < 0.05). b) Relative spectral power for wakefulness, NREM sleep and REM sleep. For wakefulness, significant genotype effects were found for frequencies 2 to 3 Hz, 6 to 8 Hz, and 14 to 50 Hz (F2,37 > 3.6, p < 0.04). For NREM sleep, significant genotype effects were found for frequencies 2 to 3 Hz, 4 to 6 Hz, 9 to 19 Hz, and 27 to 50 Hz (F2,37 > 3.3, p < 0.05). For REM sleep, significant genotype effects were found for frequencies 1 to 3 Hz, 4 to 9 Hz, 11 to 13 Hz, 15 to 16 Hz, 20 to 21 Hz, and 22 to 50 Hz (F2,37 > 3.3, p < 0.05). Red symbols indicate Hz-bins for which Nlgn2−/− mice are significantly different from Nlgn2+/+ mice (simple effect analysis; p < 0.05). For clarity, significant differences between Nlgn2+/− and Nlgn2+/+ mice have not been represented