其中腹侧纹状体又称伏核，是引起奖赏效应的重要脑区；
Dorsal striatum, namely Nucleus Accumbens, is the key brain area mediating rewarding effect.
这被认为与产生愉悦感和奖赏效应有关，而多巴胺释放的停止最终导致了对药物的渴望。
This is believed to be involved in producing feelings of pleasure and reward, and eventually in cravings for the drug when it is withdrawn.
阿片类药物同其它依赖性药物一样直接或间接作用于中脑边缘多巴胺系统，最终使伏隔核中多巴胺水平发生改变来介导奖赏效应。
The opium drugs affect the mesencephalic limbic DA system directly or indirectly as well as other dependence drugs, and ultimately alter the DA level in the NAc to mediate the awarding effects.
成瘾是精神活性物质长期作用于大脑而产生的神经适应性改变，而成瘾性物质的奖赏效应则被认为是产生精神依赖的最主要原因。
Past investigations indicated that rewarding effect of abusive drugs is considered as the major reason, which results in addiction especially psychological dependence.
成瘾是精神活性物质长期作用于大脑而产生的神经适应性改变，而成瘾性物质的奖赏效应则被认为是产生精神依赖的最主要原因。
Past investigations indicated that rewarding effect of abusive drugs is considered as the major reason, which results in addiction especially psychological dependence.
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