Figure 8

Effect of local stimulation of ChrimsonR containing neurons in the cerebral cortex with 10-ms 629-nm light pulses at 0.6Â Hz on sleep pattern. No significant differences in the amounts of wakefulness, NREM sleep and REM sleep calculated in either 3-h or 12-h intervals between the baseline and stimulation day were found. Number and duration of sleep bouts also did not change. White background indicates light periods, and grey background indicates dark periods.