評論
打印
You know how newborn babies can smell so good?
你知道新生嬰兒嗅覺何以如此靈敏?
Well that reaction might be more nature than nurture—at least for women.
嗯，這種反應可能是先天因素大于后天哺育，至少是對于女性而言。
Researchers had 30 women sniff various mystery scents while their brains were scanned.
研究人員在讓30名女性聞各種各樣的神秘氣味時對她們的大腦進行掃描。
Have the women had recently given birth.
有的女性剛剛生育。
The other half never had.
另一半則沒有。
When the subjects sniffed clothes that, unknown to them, had been worn by newborns, their brains all showed specific activity.
當受試者嗅自己并不認識的新生兒一直穿的衣服時,她們的大腦全部顯示特定的活動。
What got turned on were the same dopamine pathways that are activated by doing cocaine, by eating when hungry or by engaging in other reward-inducing behavior, like playing a slot machine.
通過吸入可卡因,餓了就吃或從事其他比如玩老虎機等獎勵誘導式行為，結果顯示相同多巴胺通路被激活。
And while all the women's brains lit up, the brains of those who had recently given birth showed significantly more activity than did the others'.
雖然所有的女性都有所反應,然而剛剛生育完女性的大腦表現比其他人的明顯更為活躍。
So the reaction to a newborn's scent may be a hard-wired bonding mechanism between mothers and infants—a biochemical reward for mom in the midst of all her hard work.
所以新生兒對于氣味的反應可能是母親和嬰兒之間與生俱來的粘結機理，是辛勤付出母親生物上的回饋。
