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Title:A fast optical imaging study of frontoparietal preparatory dynamics in response-mode switching
Author(s):Baniqued, Pauline
Advisor(s):Fabiani, Monica; Gratton, Gabriele
Department / Program:Psychology
Degree Granting Institution:University of Illinois at Urbana-Champaign
Subject(s):frontoparietal network
task switching
response preparation
executive control
functional connectivity
optical imaging
event-related brain potentials
Abstract:Coordination between networks of brain regions is important for optimal cognitive performance, especially in attention demanding tasks. With the event-related optical signal (EROS; a measure of changes in optical scattering due to neuronal activity) we can characterize rapidly evolving network processes by examining the millisecond-scale temporal correlation of activity in distinct regions during the preparatory period of a response-mode switching task. Participants received a pre-cue indicating whether to respond vocally or manually. They then saw or heard the letter “L” or “R”, indicating a “left” or “right” response to be implemented with the appropriate response modality. We employed lagged cross-correlations to characterize the dynamic connectivity of preparatory processes. Our results confirmed coupling of frontal and parietal cortices, and the trial-dependent relationship of the right frontal cortex with response preparation areas. The frontal-to-modality-specific cortex cross-correlations revealed a pattern in which first irrelevant regions were deactivated and then relevant regions were activated. These results provide a window into the sub-second-scale network interactions that flexibly tune to task demands.
Issue Date:2013-02-03
Rights Information:This work is a preprint version of an article that has been accepted for publication in the Journal of Cognitive Neuroscience: Baniqued, P.L., Low, K.A., Fabiani, M., Gratton, G. Frontoparietal traffic signals: A fast optical imaging study of preparatory dynamics in response-mode switching.
Date Available in IDEALS:2013-02-03
Date Deposited:2012-12

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