Poster D28, Monday, March 26, 8:00-10:00 am, Exhibit Hall C
Functional networks involved in creative planning while performing an ongoing task
David Maillet1,2, Roger Beaty3, Aaron Kucyi4, Daniel Schacter3; 1Department of Psychology, University of Toronto, 2Baycrest Health Sciences, 3Department of Psychology, Harvard University, 4Neurology and Neurological Sciences, Stanford University
Dual-tasking refers to the simultaneous performance of two tasks that can be done independently of each other. Although many studies have examined the neural correlates of dual-tasking, these studies usually involve two tasks requiring externally-directed attention. Relatively little is known regarding dual-tasking that involves an internally-directed attention task. In the current fMRI study, 34 young adults performed an ongoing task in which they judged whether arrows pointed left or right, and then completed an alternate uses task (AUT). In the dual-task condition, participants were given the word cue from the AUT at the beginning of the ongoing task, so that they could plan their AUT responses, whereas in the control condition, they were given the word at the end of the ongoing task, removing the possibility for planning. Participants performed equally well on the ongoing task in the single and dual-task conditions; however, participants generated more ideas for the AUT in the dual-task versus the single-task condition, providing objective evidence of dual-tasking. We assessed task differences in connectivity, with a focus on default, salience, frontoparietal and dorsal-attention networks. Salience network was more coupled with dorsal attention network during single-tasking, and with default and frontoparietal networks during dual-tasking. Also, during dual- versus single-tasking, default network exhibited reduced within-network connectivity but increased between-network connectivity with all other networks. Thus, dual-tasking involving creative planning is accomplished by a shift in salience network connectivity away from dorsal attention network, as well as more widespread default-network connectivity.
Topic Area: EXECUTIVE PROCESSES: Goal maintenance & switching