Mothers had more intense brain activity in the dopamine reward system, than women had never had children. This system is involved in reward learning and its the same that makes us crave certain foods or become addicted to drugs. It motivates us to act in ways that get us closer to the reward - in mother's cases, a baby.

在多巴胺的奖励系统中，母亲的脑部活动比没有小孩的女性更强烈。这个系统与奖励学习息息相关，并且也是我们喜爱特定食物或是对毒品上瘾的原因。它让我们竭尽所能地得到奖赏与回馈--对母亲来说，就是孩子本身。

怀孕对大脑的影响

学习重点：

1.intense 强烈的

intense (adj.) 强烈的

intensify (v.) 使...更激烈

tense (adj.) 紧绷的

2.reward 报答

reward (n.) 报答

award (n.) 奖励

3.crave 渴望

crave (v.) 渴望

craving (n.) 渴望

carve (v.) 雕刻

carving (n.) 雕刻

4.addicted 上瘾的

addicted (adj.) 上瘾的

addiction (n.) 瘾

addict (v.) 使成瘾

addict (n.) 上瘾的人

5.motivate 激发动力

motivate (v.) 激发动力

motivation (n.) 动力