Percentages of time spent in wake, NREMs and REMs (A, D,
G), as well as number of bouts (B, E, H) and mean bout
duration (C, F, I) during the 3 h recording period after saline
(white bars) or CNO (black bars) injections in MCH-Cre mice (n = 9). Saline or
CNO (0.3 mg/kg, i.p.) was administered at ZT6 and sleep-wake recordings were
conducted between ZT7-ZT10. CNO injections specifically increased the amount of
REMs (p=0.0021, 2-tailed paired t-test) and the number of REMs bouts (p=0.0106,
2-tailed paired t-test) without affecting other stages. Data are Mean ±
SEM; * P < 0.05, ** P < 0.01.