Figure 2 | Scientific Reports

Figure 2

From: Low frequency visual stimulation enhances slow wave activity without disrupting the sleep pattern in mice

Figure 2

Effect of visual stimulation with 400-ms 620-nm light pulses at 0.6 Hz on EEG power spectrum. A peak at the fundamental frequency of 0.6 Hz and multiple harmonics as an integer of this frequency were present during visual stimulation. A similar response to visual stimulation was observed on the spectrogram during wakefulness (A), NREM sleep (B) and REM sleep (C). EEG power in the stimulation frequency range (0.49–0.61 Hz) was higher during the light stimulation than baseline in all three states, wakefulness (D), NREM sleep (E) and REM sleep (F), whereas EEG power in the delta frequency range (0.49–4.52 Hz) did not change significantly. *p < 0.05.

Back to article page