Figure 6: Effects of acute MAE (30-1000 mg kg−1, p.o.), diazepam (8 mg kg−1 p.o.), and caffeine (16 mg kg−1 p.o.) on sleep duration in the pentobarbitone-induced sleeping time. Data are presented as group mean ± SEM. Significantly different from control: P<0.05, P<0.01. P<0.001.