Authors

P. Luu; A. Geyer; C. Fidopiastis; G. Campbell; T. Wheeler; J. Cohn;D. M. Tucker

Comments

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Abbreviated Journal Title

PLoS One

Keywords

TOP-DOWN FACILITATION; GAMMA-BAND RESPONSE; ORBITOFRONTAL CORTEX; GLOBAL; FEATURES; ATTENTION; EEG; NEUROSCIENCE; RECOGNITION; MECHANISMS; DISCOVERY; Multidisciplinary Sciences

Abstract

The process of perception requires not only the brain's receipt of sensory data but also the meaningful organization of that data in relation to the perceptual experience held in memory. Although it typically results in a conscious percept, the process of perception is not fully conscious. Research on the neural substrates of human visual perception has suggested that regions of limbic cortex, including the medial orbital frontal cortex (mOFC), may contribute to intuitive judgments about perceptual events, such as guessing whether an object might be present in a briefly presented fragmented drawing. Examining dense array measures of cortical electrical activity during a modified Waterloo Gestalt Closure Task, results show, as expected, that activity in medial orbital frontal electrical responses ( about 250 ms) was associated with intuitive judgments. Activity in the right temporal-parietal-occipital (TPO) region was found to predict mOFC (, 150 ms) activity and, in turn, was subsequently influenced by the mOFC at a later time (similar to 300 ms). The initial perception of gist or meaning of a visual stimulus in limbic networks may thus yield reentrant input to the visual areas to influence continued development of the percept. Before perception is completed, the initial representation of gist may support intuitive judgments about the ongoing perceptual process.

Journal Title

Plos One

Volume

5

Issue/Number

3

Publication Date

1-1-2010

Document Type

Article

Language

English

First Page

10

WOS Identifier

WOS:000275197100009

ISSN

1932-6203

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