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Example of the activity of a REM/wake-active neuron. This neuron discharged irregularly and at higher frequency during REM sleep (average firing rate 12 s−1, CV 2.69) and wakefulness (average firing rate 12.8 s−1, CV 3.5) as compared with NREM sleep (average firing rate 4.92 s−1, CV 1. 6). CV, coefficient of variability; NREM, non-rapid-eye-movement; REM, rapid-eye-movement.
