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The effects of priming on frontal-temporal communication.


ABSTRACT: Repeated exposure to a stimulus facilitates its processing. This is reflected in faster and more accurate identification, reduced perceptual identification thresholds, and more efficient classifications for repeated compared with novel items. Here, we test a hypothesis that this experience-based behavioral facilitation is a result of enhanced communication between distinct cortical regions, which reduces local processing demands. A magnetoencephalographic investigation revealed that repeated object classification led to decreased neural responses in the prefrontal cortex and temporal cortex. Critically, this decrease in absolute activity was accompanied by greater neural synchrony (a measure of functional connectivity) between these regions with repetition. Additionally, the onset of the enhanced interregional synchrony predicted the degree of behavioral facilitation. These findings suggest that object repetition results in enhanced interactions between brain regions, which facilitates performance and reduces processing demands on the regions involved.

SUBMITTER: Ghuman AS 

PROVIDER: S-EPMC2448849 | biostudies-other | 2008 Jun

REPOSITORIES: biostudies-other

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The effects of priming on frontal-temporal communication.

Ghuman Avniel S AS   Bar Moshe M   Dobbins Ian G IG   Schnyer David M DM  

Proceedings of the National Academy of Sciences of the United States of America 20080609 24


Repeated exposure to a stimulus facilitates its processing. This is reflected in faster and more accurate identification, reduced perceptual identification thresholds, and more efficient classifications for repeated compared with novel items. Here, we test a hypothesis that this experience-based behavioral facilitation is a result of enhanced communication between distinct cortical regions, which reduces local processing demands. A magnetoencephalographic investigation revealed that repeated obj  ...[more]

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