Mirroring and brain connectivity of gesture observation

Pub Date : 2021-11-01 DOI:10.7358/neur-2021-030-fron
Giulia Fronda
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Abstract

Non-verbal communication involves di rent channels, as gestures, to communicate different information. The present study aims investigating the electrophysiological (EEG) correlates underlying the use of affective, social, and informative gestures during gesture observation by an encoder (who observed to reproduce the gestures successively) and decoder (who simply observed the gestures). Mirroring mechanisms were considered for a gesture observation task. Results showed an increase of frontal alpha, delta, and theta brain responsiveness and intra-brain connectivity for affective and social gestures. and of posterior (temporo-parietal) alpha activity and alpha and delta intra-brain connectivity for informative ones. Concerning inter-agents' role, similar responses were found for all gestures. Regarding gesture valence, an increase of delta and theta activity was observed for positive gestures on the left cerebral side. This study, therefore, revealed the function of gestures' type and valence in influencing individuals' brain activity, showing the presence of mirroring mechanisms underlying gesture observation.
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手势观察的镜像与脑连通性
非语言交流包括不同的渠道,如手势,来传达不同的信息。本研究的目的是研究在编码器(连续观察再现手势)和解码器(简单观察手势)的手势观察过程中,情感、社交和信息手势使用的电生理(EEG)相关性。镜像机制被认为是手势观察任务。结果显示,大脑额叶α、δ和θ的反应以及大脑内对情感和社交手势的连接都有所增加。以及后(颞顶叶)α活动和α和δ脑内连接对于信息型大脑。关于主体间的角色,所有手势的反应都是相似的。在手势效价方面,左脑积极手势的δ和θ活动增加。因此,本研究揭示了手势类型和效价对个体大脑活动的影响,表明手势观察存在镜像机制。
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