Aim To study the effect of different doses of l-Tetrahydropalmatine( l-THP) on morphine-induced conditioned place preference(CPP) and observe whether l-THP itself induces CPP.

• 目的探讨不同剂量的左旋四氢巴马汀(lTetrahydropalmatine,lTHP)对吗啡诱导的条件性位置偏爱(CPP)的影响以及自身能否产生CPP效应。