Neural representations of the body in 60‐day‐old human infants
Neural representations of the body in 60‐day‐old human infants
复制标题
60 天大的人类婴儿身体的神经表征
DOI：
10.1111/desc.12698
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发表时间：
2018
影响因子：
3.7
通讯作者：
Marshall, Peter J.
中科院分区：
文献类型：
--
作者：
Meltzoff, Andrew N.;Saby, Joni N.;Marshall, Peter J.
成年人大脑中身体表征的组织已经得到了很好的证明。对于人类婴儿期大脑组织的这一方面，我们知之甚少。目前的研究使用60天大的婴儿的脑电图（EEG）来测试大脑对三个不同身体部位（手，脚和嘴唇）触觉刺激的反应分布。分析集中在中央和顶叶电极部位的体感诱发电位在150-200 ms时出现显著的正反应。结果显示了这三个身体部位的触摸的差异电生理特征。左手的刺激与刺激侧对侧的外侧中心区域的更大正振幅相关。左脚刺激与中线顶骨部位的更大阳性相关。刺激上唇中线与中央区域的强烈双边反应。这些发现为婴儿期身体的神经表征提供了新的见解，并阐明了有关躯体感觉皮层参与婴儿模仿和社会感知的研究和理论。
The organization of body representations in the adult brain has been well documented. Little is understood about this aspect of brain organization in human infancy. The current study employed electroencephalography (EEG) with 60‐day‐old infants to test the distribution of brain responses to tactile stimulation of three different body parts: hand, foot, and lip. Analyses focused on a prominent positive response occurring at 150–200 ms in the somatosensory evoked potential at central and parietal electrode sites. The results show differential electrophysiological signatures for touch of these three body parts. Stimulation of the left hand was associated with greater positive amplitude over the lateral central region contralateral to the side stimulated. Left foot stimulation was associated with greater positivity over the midline parietal site. Stimulation of the midline of the upper lip was associated with a strong bilateral response over the central region. These findings provide new insights into the neural representation of the body in infancy and shed light on research and theories about the involvement of somatosensory cortex in infant imitation and social perception.