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J Neurosci. 2008 Mar 12;28(11):2793-803. doi: 10.1523/JNEUROSCI.3476-07.2008.

Rapid interactions between the ventral visual stream and emotion-related structures rely on a two-pathway architecture.

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  • 1Centre 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.

Abstract

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.

PMID:
18337409
[PubMed - indexed for MEDLINE]
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