Table 1.

Comparison of average escape latency time for each group in the hidden platform trial.

Treatment	Escape latency time/second
	1st day	2nd day	3rd day	4th day	5th day
Control	38.37 ± 3.25	33.60 ± 4.45	29.76 ± 2.96	21.36 ± 4.19	16.54 ± 2.72#
Model	45.06 ± 1.90	42.64 ± 1.87	32.68 ± 3.93	33.28 ± 2.72	34.18 ± 2.68^
0.5 g/kg Piracetam	41.01 ± 2.62	33.02 ± 3.04	29.83 ± 2.79	28.06 ± 3.33	21.07 ± 2.61#&
0.39 g/kg-DXN	35.77 ± 3.65	31.08 ± 3.63	33.11 ± 3.51	27.61 ± 3.63	25.75 ± 3.22&
2.35 g/kg-DXN	43.86 ± 3.29	35.43 ± 3.08	34.29 ± 3.66	27.87 ± 3.05	20.71 ± 3.14#&

Data are the average of 14 animals in each group. There is significant difference among these groups when symbols are different (P < 0.05).