@article{ref1,
title="Frontoparietal traffic signals: a fast optical imaging study of preparatory dynamics in response mode switching",
journal="Journal of cognitive neuroscience",
year="2013",
author="Low, Kathy A. and Baniqued, Pauline L. and Gratton, Gabriele and Fabiani, Monica",
volume="25",
number="6",
pages="887-902",
abstract="Coordination between networks of brain regions is important for optimal cognitive performance, especially in attention demanding tasks. With the event-related optical signal (a measure of changes in optical scattering because of 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 precue indicating whether to respond vocally or manually. They then saw or heard the letter &quot;L&quot; or &quot;R,&quot; indicating a &quot;left&quot; or &quot;right&quot; 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 subsecond scale network interactions that flexibly tune to task demands.<p /> <p>Language: en</p>",
language="en",
issn="0898-929X",
doi="10.1162/jocn_a_00341",
url="http://dx.doi.org/10.1162/jocn_a_00341"
}