{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/42453"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/42453","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"A fast optical imaging study of frontoparietal preparatory dynamics in response-mode switching","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.","abstract_html":"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.","abstract_has_math":false,"creators":["Baniqued, Pauline"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.A.","degree_level":"Thesis","degree_discipline":"Psychology","degree_department":null,"school":null,"contributors":["Fabiani, Monica","Gratton, Gabriele"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2013,"date_issued":"2013-02-03T19:46:09Z","date_published":"2013-02-03T19:46:09Z","updated_at":"2026-07-22T22:25:33Z","subjects":["frontoparietal network","task switching","response preparation","executive control","functional connectivity","optical imaging","event-related brain potentials"],"languages":["en"],"rights":["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. 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