Table 1.

Effects of LD extract on brain coefficient and adrenal coefficient in PCPA-induced insomnia rat ($\overline{\text{x}}$ ± s, n = 8).

Group	Dosage(mg/kg)	Brain coefficient	Adrenal coefficient
Con	−	0.75 ± 0.03	0.010 ± 0.004
PCPA	400	0.73 ± 0.04	0.016 ± 0.002**
Est	0.5	0.80 ± 0.04#	0.014 ± 0.002
LD-L	185.22	0.77 ± 0.04	0.014 ± 0.001
LD-M	370.44	0.79 ± 0.03#	0.012 ± 0.002##
LD-H	740.88	0.79 ± 0.02#	0.013 ± 0.002#

Results expressed as the means ± SE (n = 8). Statistical differences between groups were analysed statistically by One-Way ANOVA. *p < 0.05 and **p < 0.01 compared with Con, ^#p < 0.05 and ^##p < 0.01 compared with PCPA.