Table 5.

Locomotor activity (m) during the conditioning phase in the drug paired side (experiment 2)

Treatment	Dose	Day 1	Day 3	Day 5	Day 7
Saline	10 ml/kg	64.58±14.19	68.18±12.70	67.91±10.80	61.95±13.47
Morphine	5 mg/kg	96.68±8.37**	93.69±15.33**	89.38±13.20*	92.64±13.78**
Morphine+MRZ2/576	(5+1.25) mg/kg	93.83±17.66**	96.63±18.08**	86.38±32.25*	81.86±23.14*
	(5+2.5) mg/kg	87.99±22.56**	80.80±25.36*	88.36±28.96*	76.95±20.92*#
	(5+5) mg/kg	62.20±15.82	58.03±19.56	54.18±28.87	48.84±18.04#

^** P<0.001, compared with saline group

^* P<0.01, compared with saline group

^# P<0.01, compared with Day 1