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They then saw or heard the letter \u201cL\u201d or \u201cR,\u201d indicating a \u201cleft\u201d or \u201cright\u201d 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.<\/jats:p>","DOI":"10.1162\/jocn_a_00341","type":"journal-article","created":{"date-parts":[[2012,12,18]],"date-time":"2012-12-18T15:06:39Z","timestamp":1355843199000},"page":"887-902","update-policy":"http:\/\/dx.doi.org\/10.1162\/mitpressjournals.corrections.policy","source":"Crossref","is-referenced-by-count":13,"title":["Frontoparietal Traffic Signals: A Fast Optical Imaging Study of Preparatory Dynamics in Response Mode Switching"],"prefix":"10.1162","volume":"25","author":[{"given":"Pauline L.","family":"Baniqued","sequence":"first","affiliation":[]},{"given":"Kathy A.","family":"Low","sequence":"additional","affiliation":[]},{"given":"Monica","family":"Fabiani","sequence":"additional","affiliation":[]},{"given":"Gabriele","family":"Gratton","sequence":"additional","affiliation":[]}],"member":"281","published-online":{"date-parts":[[2013,6,1]]},"reference":[{"key":"2021072913304647600_R1","first-page":"421","article-title":"Shifting intentional set: Exploring the dynamic control of tasks.","volume-title":"Attention and performance XV: Conscious and nonconscious information processing","author":"Allport","year":"1994"},{"key":"2021072913304647600_R2","doi-asserted-by":"crossref","first-page":"1561","DOI":"10.1093\/brain\/awh169","article-title":"A componential analysis of task-switching deficits associated with lesions of left and right frontal cortex.","volume":"127","author":"Aron","year":"2004","journal-title":"Brain: A Journal of Neurology"},{"key":"2021072913304647600_R3","doi-asserted-by":"crossref","first-page":"7186","DOI":"10.1073\/pnas.0509550103","article-title":"Computational and neurobiological mechanisms underlying cognitive flexibility.","volume":"103","author":"Badre","year":"2006","journal-title":"Proceedings of the National Academy of Sciences, U.S.A."},{"key":"2021072913304647600_R4","doi-asserted-by":"crossref","first-page":"89","DOI":"10.1111\/j.1467-8721.2009.01615.x","article-title":"Executive function.","volume":"18","author":"Banich","year":"2009","journal-title":"Current Directions in Psychological Science"},{"key":"2021072913304647600_R6","doi-asserted-by":"crossref","first-page":"1367","DOI":"10.1162\/0898929054985400","article-title":"Who comes first? 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