New research finds that smiles can be used to both soothe or attack - at least, as far as the brain's stress pathways are concerned.
新研究发现,微笑既可用于安抚,也能产生伤害,至少对于大脑的应激通路确是如此。
The study, published by researchers from the University of Wisconsin-Madison and Bar-Ilan University, looked at the interaction between nonverbal feedback and the activity of the hypothalamic-pituitary-adrenal axis, our body's central stress response system.
威斯康星大学麦迪逊大学和巴伊兰大学的研究人员发表的这项研究,对非语言反馈与下丘脑-垂体-肾上腺轴,即我们身体的主要压力应对系统之间的互动进行了调查。
The authors report that individuals with higher heart-rate variability showed the widest range of responses to different smiles.
作者报告称,心率可变性大的人对不同笑容的反应差异性也更大。
Higher heart rate variability has previously been correlated with a higher ability to recognize facial expressions.
此前,心率可变性大就被认为与辨认面部表情的能力更强有关。
"The findings provide further evidence for the view that smiles do not necessarily constitute positive nonverbal feedback, and that they may impact social interactions by affecting the physiological reaction of people who perceive them," the authors write.
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