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Published on: August 19, 2020
Infant brain activity in response to yawning using functional near-infrared spectroscopy
Shuma Tsurumi1,2, So Kanazawa3, Masami K Yamaguchi4
1Department of psychology, Chuo University, 742-1, Higashinakano, Hachioji, Tokyo, 192-0393, Japan. a13.je84@g.chuo-u.ac.jp.
Abstract:
Yawning is contagious in human adults. While infants do not show contagious yawning, it remains unclear whether infants perceive yawning in the same manner as other facial expressions of emotion. We addressed this problem using functional near-infrared spectroscopy (fNIRS) and behavioural experiments. We confirmed behaviourally that infants could discriminate between yawning and unfamiliar mouth movements. Furthermore, we found that the hemodynamic response of infants to a yawning movement was greater than that to mouth movement, similarly to the observations in adult fMRI study. These results suggest that the neural mechanisms underlying yawning movement perception have developed in advance of the development of contagious yawning.
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