Marois Rene
Last active: 4/10/2017

A common parieto-frontal network is recruited under both low visibility and high perceptual interference conditions.

Marois R, Chun MM, Gore JC
J Neurophysiol. 2004 92 (5): 2985-92

PMID: 15486425 · DOI:10.1152/jn.01061.2003

A fundamental property of visual attention is to select targets from interfering distractors. However, attention can also facilitate the detectability of near-threshold items presented in isolation. The extent to which these two perceptually challenging conditions are resolved by the same neural mechanisms is not well known. In the present event-related fMRI experiment, subjects performed a letter identification task under two perceptually challenging conditions; when the luminance contrast of a target letter was reduced (perceptual visibility manipulation) and when the target letter was flanked by distractors (perceptual interference manipulation). Perceptual interference recruited the right parietal and mid-lateral frontal cortex, while perceptual visibility activated these regions bilaterally. The overlap of activated areas between the two perceptual manipulations suggests that a single parieto-frontal network is summoned under both perceptual visibility and interference conditions.

MeSH Terms (9)

Attention Brain Mapping Humans Magnetic Resonance Imaging Nerve Net Parietal Lobe Perception Visual Pathways Visual Perception

Connections (2)

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