Figure 6.

Individual (A) and group (B) firing rates of putative noradrenergic A7 neurons during sleep and wakefulness. A: individual firing rates of A7 cells are represented by unique symbols during the successive states of NREM sleep, REM sleep, and wakefulness. Note that all, but one, A7 cells were silenced during REM sleep. B: during REM sleep, the average firing rate of the A7 neurons were minimal and significantly different from that during NREM and wakefulness (***P < 0.001, one-way RM ANOVA). However, the mean firing rates of A7 cells were not different (P = 0.58) during NREM and wakefulness. NREM, non-rapid-eye-movement; REM, rapid-eye-movement.