Rudrauf David, David Olivier, Lachaux Jean-Philippe, Kovach Christopher K, Martinerie Jacques, Renault Bernard, Damasio Antonio
Centre National de la Recherche Scientifique, Unité Propre de Recherche 640-Laboratoire d'Electroencephalographie et de Neurophysiologie Appliquée, Université Pierre et Marie Curie, Hôpital de la Pitié-Salpêtrière, Paris, France.
J Neurosci. 2008 Mar 12;28(11):2793-803. doi: 10.1523/JNEUROSCI.3476-07.2008.
Visual attention can be driven by the affective significance of visual stimuli before full-fledged processing of the stimuli. Two kinds of models have been proposed to explain this phenomenon: models involving sequential processing along the ventral visual stream, with secondary feedback from emotion-related structures ("two-stage models"); and models including additional short-cut pathways directly reaching the emotion-related structures ("two-pathway models"). We tested which type of model would best predict real magnetoencephalographic responses in subjects presented with arousing visual stimuli, using realistic models of large-scale cerebral architecture and neural biophysics. The results strongly support a "two-pathway" hypothesis. Both standard models including the retinotectal pathway and nonstandard models including cortical-cortical long-range fasciculi appear plausible.
在对视觉刺激进行全面处理之前，视觉注意力可以由视觉刺激的情感意义驱动。已经提出了两种模型来解释这一现象：一种是沿着腹侧视觉通路进行顺序处理，并伴有来自情绪相关结构的次级反馈的模型（“两阶段模型”）；另一种是包括直接到达情绪相关结构的额外捷径通路的模型（“双通路模型”）。我们使用大规模脑结构和神经生物物理学的真实模型，测试了哪种类型的模型最能预测接受刺激性视觉刺激的受试者的真实脑磁图反应。结果有力地支持了“双通路”假说。包括视网膜顶盖通路的标准模型和包括皮质-皮质长距离纤维束的非标准模型似乎都有道理。
