Objective To explore the effect of electroacupuncture on heroin seeking behavior and FosB expression in relevant brain regions.Methods Rat model of heroin relapse behaviors was developed with progressive fixed ratio program,and model rats were randomly divided into 3 groups: a restraint group,a needle retention group,and a electroacupuncture group.The heroin seeking behavior was elicited by a small dose of heroin.FosB expression in relevnt brain region was assessed with immunohistochemical technique.Results...