Table 1.

Effect of the CUMS on locomotor activity of saline- or nicotine-conditioned rats recorded as distance (m) traveled during 15 min

Procedure	Conditioning
	Saline	Nicotine
Without CUMS	30.05 ± 3.35	30.53 ± 1.73
After CUMS	19.11 ± 3.46^	18.59 ± 2.79**

Results are expressed as mean ± SEM (n = 8)

**P < 0.01 vs. unstressed nicotine-conditioned rats; ^P < 0.05 vs. unstressed saline-conditioned rats (Tukey’s test)