Tel Aviv Sourasky Medical Center, Israel.
J Cogn Neurosci. 2012 Mar;24(3):531-42. doi: 10.1162/jocn_a_00165. Epub 2011 Nov 18.
The ability to selectively perceive items in the environment may be modulated by the emotional content of those items. The neural mechanism that underlies the privileged processing of emotionally salient content is poorly understood. Here, using fMRI, we investigated this issue via a binocular rivalry procedure when face stimuli depicting fearful or neutral expressions competed for awareness with a house. Results revealed an interesting dissociation in the amygdala during rivalry condition: Whereas its dorsal component exhibited dominant activation to aware fearful faces, a ventral component was more active during the suppression of fearful faces. Moreover, during rivalry, the dorsal and ventral components of the amygdala were coupled with segregated cortical activations in the brainstem and medial PFC, respectively. In summary, this study points to a differential involvement of two clusters within the amygdala and their connected networks in naturally occurring perceptual biases of emotional content in faces.
环境中项目的选择性感知能力可能受到这些项目的情感内容的调节。支持情感显著内容的优先处理的神经机制尚未被很好地理解。在这里，我们使用 fMRI 通过双眼竞争程序研究了这个问题，当描绘恐惧或中性表情的面孔刺激与房屋竞争意识时。结果表明，在竞争条件下杏仁核中存在有趣的分离：尽管其背侧成分对有意识的恐惧面孔表现出优势激活，但腹侧成分在抑制恐惧面孔时更活跃。此外，在竞争期间，杏仁核的背侧和腹侧成分分别与脑干和内侧 PFC 中的分离皮质激活耦合。总之，这项研究指出了杏仁核内两个簇及其连接网络在自然发生的面孔中情感内容的感知偏差中的差异参与。
