Journal
JOURNAL OF NEUROSCIENCE
Volume 28, Issue 11, Pages 2793-2803Publisher
SOC NEUROSCIENCE
DOI: 10.1523/JNEUROSCI.3476-07.2008
Keywords
attention; emotion; limbic; magnetoencephalography; network; visual
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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.
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