Feeling or features: Different sensitivity to emotion in high-order visual cortex and amygdala
Feeling or features: Different sensitivity to emotion in high-order visual cortex and amygdala
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DOI：
10.1016/s0896-6273(01)00513-x
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发表时间：
2001-11-20
期刊：
影响因子：
16.2
通讯作者：
Hendler, T
中科院分区：
文献类型：
--
作者：
Rotshtein, P;Malach, R;Hendler, T
视觉负荷的视觉刺激显示出视觉和皮质边缘区的激活增加。然而，这些图像的视觉特征的差异可能会混淆这些发现。为了在保持视觉特征基本不变的同时操纵刺激的效价，我们利用了面孔的“表情变形”（ET）效应。此外，我们使用了重复效应，这使我们能够更深入地测试ET效应的影响。使用ET操作，我们已经表明，在外侧枕叶复合体（ESTA）的激活不受效价属性，但产生了显着的调制fMR适应。相反，杏仁核激活增加ET操纵无关的适应。杏仁核和视皮层适应之间的相关性表明杏仁核对视皮层短期可塑性可能具有调节作用。
Emotionally loaded visual stimuli have shown increased activation in visual and cortex limbic areas. However, differences in visual features of such images could confound these findings. In order to manipulate valence of stimuli while keeping visual features largely unchanged, we took advantage of an "expressional transfiguration" (ET) effect of faces. In addition, we used repetition effects, which enabled us to test more incisively the impact of the ET effect. Using the ET manipulation, we have shown that the activation in lateral occipital complex (LOC) was unaffected by valence attributes, but produced significant modulation of fMR adaptation. Contrary to LOC, amygdala activation was increased by ET manipulation unrelated to the adaptation. A correlation between amygdala and LOC adaptation points to a possible modulatory role of the amygdala upon visual cortex short-term plasticity.