Near‐infrared spectroscopy reveals neural perception of vocal emotions in human neonates
Near‐infrared spectroscopy reveals neural perception of vocal emotions in human neonates
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DOI：
10.1002/hbm.24534
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发表时间：
2019-06
影响因子：
4.8
通讯作者：
Dandan Zhang;Yu Chen;Xinlin Hou;Y. Wu
中科院分区：
文献类型：
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作者：
Dandan Zhang;Yu Chen;Xinlin Hou;Y. Wu
情感韵律是说话人的情绪语调，是人类交际和适应行为的基础。以前的研究主要集中在成人和婴儿，因此，新生儿的情感韵律加工的神经机制仍然不清楚。在这里，我们使用近红外光谱来检查0至4天的新生儿区分母语和外语中语音韵律所传达的情绪的能力。快乐、恐惧和愤怒的韵律增强了右侧上级颞回的神经激活，相对于母语中的中性韵律，而不是外语。快乐的韵律比消极的韵律在左额上级回和左角回引起更大的激活，这些区域在婴儿或成人中与情感韵律处理无关。这些研究结果表明，情感韵律的敏感性是通过产前暴露于母体语言的声音刺激形成的。此外，敏感的神经相关性似乎在新生儿中比婴儿中分布得更多，表明新生儿阶段和婴儿早期之间的神经特化水平较高。最后，新生儿表现出优先的神经反应，积极的负面韵律，这是相反的“负面偏见”的现象，在成人和婴儿的研究。
Processing affective prosody, that is the emotional tone of a speaker, is fundamental to human communication and adaptive behaviors. Previous studies have mainly focused on adults and infants; thus the neural mechanisms underlying the processing of affective prosody in newborns remain unclear. Here, we used near‐infrared spectroscopy to examine the ability of 0‐to‐4‐day‐old neonates to discriminate emotions conveyed by speech prosody in their maternal language and a foreign language. Happy, fearful, and angry prosodies enhanced neural activation in the right superior temporal gyrus relative to neutral prosody in the maternal but not the foreign language. Happy prosody elicited greater activation than negative prosody in the left superior frontal gyrus and the left angular gyrus, regions that have not been associated with affective prosody processing in infants or adults. These findings suggest that sensitivity to affective prosody is formed through prenatal exposure to vocal stimuli of the maternal language. Furthermore, the sensitive neural correlates appeared more distributed in neonates than infants, indicating a high‐level of neural specialization between the neonatal stage and early infancy. Finally, neonates showed preferential neural responses to positive over negative prosody, which is contrary to the “negativity bias” phenomenon established in adult and infant studies.