If you give cocaine to an addict, you are affecting their brain?s reward system, but this is not what drives the person to keep using cocaine,?Dr.Paulus said.The craving is what gets people to use.

• 如果你对可卡因上瘾，你会改变可卡因的大脑奖赏系统，但这并不是使用可卡因的驱动力。