打哈欠为什么会传染？估计很多朋友都有过类似经历，当看到别人“打哈欠”的时候，自己也不由自主的“打哈欠”，即使自己不是很疲惫！很多人调侃哈欠是可以“传染的”，哈哈。近日，Current Biology发表文章“Aneural basis for contagious yawning”给出了答案，原来"打哈欠"会传染是由于负责运动功能的大脑区域的运动皮层的原始性条件反射导致的。

（具体细节可查询原文http://www.cell.com/current-biology/abstract/S0960-9822(17)30966-1或新闻报道原文https://medicalxpress.com/news/2017-08-yawningwhy-contagious.html）。

Stephen Jackson, Professor of Cognitive Neuroscience.He said: "We suggest that these findings may be particularly important inunderstanding further the association between motor excitability and theoccurrence of echophenomena in a wide range of clinical conditions that havebeen linked to increased cortical excitability and/or decreased physiologicalinhibition such as epilepsy, dementia, autism, and Tourette syndrome."