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Effect of optogenetic activation of rat MCH neurons on NREMS delta power and REMS theta power. ECoG power was determined only during NREM sleep (delta) or REM sleep (theta). To improve visualization hourly data was pooled in 3 h blocks for delta power and in 6 h for theta power. Gray horizontal bars denote the 12h lights-off, night period. *=significance versus 0 Hz (p=0.01).
