Nelson C A, De Haan M
University of Minnesota Institute, of Child Development, Minneapolis 55455, USA.
Dev Psychobiol. 1996 Nov;29(7):577-95. doi: 10.1002/(SICI)1098-2302(199611)29:7<577::AID-DEV3>3.0.CO;2-R.
An extensive literature documents the infant's ability to recognize and discriminate a variety of facial expressions of emotion. However, little is known about the neural bases of this ability. To examine the neural processes that may underlie infants' responses to facial expressions, we recorded event-related potentials (ERPs) while 7-month-olds watched pictures of a happy face and a fearful face (Experiment 1) or an angry face and a fearful face (Experiment 2). In both experiments an early positive component, a middle-latency negative component and a later positive component were elicited. However, only when the infants saw the happy and fearful faces did the components differ for the two expressions. These results are discussed in the context of the neurobiological processes involved in preceiving facial expressions.
大量文献记载了婴儿识别和区分各种面部表情的能力。然而，对于这种能力的神经基础却知之甚少。为了研究婴儿对面部表情做出反应可能背后的神经过程，我们记录了7个月大婴儿观看快乐面孔和恐惧面孔图片（实验1）或愤怒面孔和恐惧面孔图片（实验2）时的事件相关电位（ERP）。在两个实验中均诱发了一个早期正成分、一个中潜伏期负成分和一个晚期正成分。然而，只有当婴儿看到快乐和恐惧面孔时，这两个表情的成分才有所不同。我们将在感知面部表情所涉及的神经生物学过程的背景下讨论这些结果。
