Figure 2.

Effect of treatments on the sleep onset and physiological phenotype. The latency (seconds) and duration time (mins) of sleep onset in mice treated with a subhypnotic dose of sodium pentobarbital were expressed as mean ± standard error of the mean. aP < 0.001 and bP < 0.01 vs. the blank group; cP < 0.01 and dP < 0.05 vs. the sham group. Feces and appetite status were recorded daily, and status summaries were generated at the last day of treatment.