Effect of the observed pupil size on the amygdala of the beholders
Effect of the observed pupil size on the amygdala of the beholders
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DOI：
10.1093/scan/nsr013
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发表时间：
2012-03-01
影响因子：
4.2
通讯作者：
Ohtomo, Kuni
中科院分区：
文献类型：
--
作者：
Amemiya, Shiori;Ohtomo, Kuni
在杏仁核的一系列认知功能中，最近的研究表明它参与了瞳孔大小的识别。为了进一步说明它的作用，我们研究了杏仁核对不同瞳孔大小的人和猫面孔的反应，同时考虑到性别和主观吸引力评级的影响。27名受试者接受了功能性磁共振成像，同时观察大瞳孔和小瞳孔的面孔。大瞳孔的面孔引起杏仁核激活增加，没有任何主题或刺激性别的相互作用，虽然没有看到猫脸刺激同等的激活差异。激活的差异是无关的感知的吸引力，并没有明确的知识操纵的瞳孔大小。这些数据支持这样一种观点，即杏仁核不仅对显性或隐性的恐惧、憎恶或偏好做出反应，而且对其他可能表明对生物相关刺激提高警惕的因素也做出反应，而这并不一定需要主观意识。
Among a range of cognitive functions of the amygdala, recent studies suggest its involvement in identification of the pupil size. To further address its role, we investigated the response of the amygdala to human and cat faces with varied pupil size, taking into account the effect of the gender and subjective attractiveness ratings. Twenty-seven subjects underwent functional magnetic resonance imaging while viewing faces with large and small pupils. Large pupil faces induced increased activation in the amygdala, without interactions with either subject or stimuli gender, although no equivalent activation differences were seen for cat face stimuli. The activation differences were irrespective of the perceived attractiveness, and without explicit knowledge about the manipulation of the pupil size. These data support the idea that the amygdala is responsive not only to explicit or implicit fear, abhorrence or preference, but also to other elements that might suggest heightened vigilance of biologically relevant stimuli, which does not necessarily require subjective awareness.