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想打哈欠时忍不住?研究告诉你:忍也白忍

2017-09-03 06:55:57   新华网

打哈欠时怎么也忍不住?不止你一个人如此。英国诺丁汉大学研究人员发现,想忍住不打哈欠都会以失败告终,越是强忍着,渴望反而越强烈,而且最终不会少打一个哈欠。

研究人员招募36名志愿者,让他们观看他人打哈欠的视频,并允许随意打哈欠。第二次,研究人员让志愿者观看相同视频,但必须忍住不打哈欠。结果,志愿者们在第二次时10分钟内平均打了0.17个完整的哈欠、3.86个“强忍住的”哈欠,哈欠总数与第一次可随意打哈欠时一样。

研究人员还要求志愿者记录对打哈欠的渴望,结果,当被要求抑制这种渴望时,志愿者反而更渴望打哈欠。

英国《每日邮报》8月31日援引研究牵头人、认知神经科学教授史蒂芬·杰克逊的话报道,打哈欠的传染效应因人而异,有人在10分钟内打了30个哈欠,也有人一个都没打。当人们试图忍着不打哈欠时,大脑初级运动皮质区变得紧张,这一区域控制打哈欠等行为,人们因此变得更渴望打哈欠。

研究人员认为,这一结果可能有助治疗痴呆症。痴呆症患者的症状之一就是易受他人打哈欠传染,而且一打就停不下来。(黄敏)【新华社微特稿】

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