In addition, the results of the study, which show the time causal relationship between worsen functioning in frontal lob and the abnormity in hippocampus, provide the new evidence of motive theory of drug addiction.

• 本研究结果一方面为成瘾的动机假说提供了新的支持，另一方面提出海洛因依赖者在停药1个月左右复发的风险最大。