Responses of single neurons in monkey amygdala to facial and vocal emotions
Responses of single neurons in monkey amygdala to facial and vocal emotions
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DOI：
10.1152/jn.00464.2006
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发表时间：
2007-02-01
影响因子：
2.5
通讯作者：
Nakamura, Katsuki
中科院分区：
文献类型：
--
作者：
Kuraoka, Koji;Nakamura, Katsuki
脸和声音可以独立地传达相同的情感信息。当我们看到一张愤怒的脸或听到一个愤怒的声音时，我们可以感知到一个人的愤怒。从这个意义上说，这两种不同的感官线索是可以互换的。然而，目前尚不清楚同一组神经元是否处理面部和声音情绪的信号。我们记录了猴子杏仁核的神经元活动，同时观看了9个特定物种情绪表达的视频片段：3只猴子表现出3种情绪表达（攻击性威胁、尖叫和coo）。在测试的227个杏仁核神经元中，116个神经元（51%）对至少一种情绪表达做出反应。这些“猴子反应”神经元——也就是对猴子特有的情感表达做出反应的神经元——无论身份如何，都更喜欢尖叫而不是其他情感表达。为了确定对神经元反应至关重要的元素，在单独呈现刺激的面部或声音元素时，记录了79个猴子反应神经元的活动。尽管大多数神经元（61/79,77%）对视觉元素有强烈反应，但对听觉元素没有强烈反应，但大约五分之一的神经元（16/79,20%）在呈现面部或声音元素时保持良好的反应。此外，这些神经元在面部和声音条件下保持刺激偏好。这些神经元位于杏仁核的中央核，该核接收来自其他杏仁核的输入，然后将输出发送到其他与情绪相关的大脑区域。这些对情绪的超模态反应将用于对面部或声音情绪的信息产生适当的反应。
The face and voice can independently convey the same information about emotion. When we see an angry face or hear an angry voice, we can perceive a person's anger. These two different sensory cues are interchangeable in this sense. However, it is still unclear whether the same group of neurons process signals for facial and vocal emotions. We recorded neuronal activity in the amygdala of monkeys while watching nine video clips of species-specific emotional expressions: three monkeys showing three emotional expressions (aggressive threat, scream, and coo). Of the 227 amygdala neurons tested, 116 neurons (51%) responded to at least one of the emotional expressions. These "monkey-responsive" neurons - that is, neurons that responded to monkey-specific emotional expression - preferred the scream to other emotional expressions irrespective of identity. To determine the element crucial to neuronal responses, the activity of 79 monkey-responsive neurons was recorded while a facial or vocal element of a stimulus was presented alone. Although most neurons (61/79, 77%) strongly responded to the visual but not to the auditory element, about one fifth (16/79, 20%) maintained a good response when either the facial or vocal element was presented. Moreover, these neurons maintained their stimulus-preference profiles under facial and vocal conditions. These neurons were found in the central nucleus of the amygdala, the nucleus that receives inputs from other amygdala nuclei and in turn sends outputs to other emotion-related brain areas. These supramodal responses to emotion would be of use in generating appropriate responses to information regarding either facial or vocal emotion.