Target visibility and visual awareness modulate amygdala responses to fearful faces.
Target visibility and visual awareness modulate amygdala responses to fearful faces.
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DOI：
10.1093/cercor/bhi115
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发表时间：
2006-03
期刊：
影响因子：
3.7
通讯作者：
L. Pessoa;S. Japee;D. Sturman;Leslie G. Ungerleider
中科院分区：
文献类型：
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作者：
L. Pessoa;S. Japee;D. Sturman;Leslie G. Ungerleider
本研究报告有两个目标。首先，我们希望通过信号检测理论的方法来描述每个受试者的行为表现后，调查有意识和无意识的情绪面孔知觉的神经相关性。其次，我们希望研究杏仁核对恐惧面孔的反应在多大程度上取决于刺激的物理特征，而不依赖于被试。我们表明，杏仁核的反应取决于视觉意识。在受试者没有意识到恐惧的面孔闪现33毫秒的条件下，在杏仁核中没有观察到差异激活。另一方面，观察到差异激活67毫秒的可怕的目标，受试者可以可靠地检测。当试验分为命中，失误，正确的拒绝，和错误的警报，我们表明，目标的可见性是一个重要因素，在确定杏仁核反应的恐惧的面孔。总之，我们的研究结果进一步挑战了杏仁核反应自动发生的观点。
The goals of the present study were twofold. First, we wished to investigate the neural correlates of aware and unaware emotional face perception after characterizing each subject's behavioral performance via signal detection theory methods. Second, we wished to investigate the extent to which amygdala responses to fearful faces depend on the physical characteristics of the stimulus independently of the percept. We show that amygdala responses depend on visual awareness. Under conditions in which subjects were not aware of fearful faces flashed for 33 ms, no differential activation was observed in the amygdala. On the other hand, differential activation was observed for 67 ms fearful targets that the subjects could reliably detect. When trials were divided into hits, misses, correct rejects, and false alarms, we show that target visibility is an important factor in determining amygdala responses to fearful faces. Taken together, our results further challenge the view that amygdala responses occur automatically.