Anticipatory processes in brain state switching - implicating default mode and salience networks
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1
Ghent University , Experimental-Clinical and Health Psychology, Belgium
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2
Ghent University, Experimental Psychology, Belgium
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3
Ghent University Hospital, Ghent Institute for Functional and Metabolic Imaging, Belgium
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4
University of Southampton, Developmental Brain-Behaviour Unit, Psychology, United Kingdom
Background: Effective performance and self-regulation is mediated by the ability to adequately attenuate the default mode network (DMN) - a core brain system supporting internally oriented cognition - when switching from rest to an externally oriented mode of processing. The central hub of the salience network (SN) - right anterior insula (rAI) has been suggested to control the disengagement from the DMN and the engagement of task-specific brain networks. While steady-state outcomes of such switches have been well investigated, we know little about the process of transitioning between mental states. In particular much more needs to be understood about the extent to which anticipatory switch-related processes are related to DMN and SN modulation. In the current study we addressed this issue by investigating anticipatory DMN and SN modulation by employing a novel cued-switching task incorporating between-state (rest-to-task/task-to-rest) and within-state (task-to-task) transitions.
Methods: Twenty neurologically healthy adults performed the cued-switching task implemented as an event-related fMRI design.
Results: Briefly presented cues signalling rest periods elicited activity in the DMN. Rest-to-task switch cues elicited DMN suppression, whereas task-to-rest cues elicited up-regulation of the DMN. The strongest rAI response was elicited by rest-to-task cues, followed by task-to-task switch cues, while rAI was not activated when switching from task-to-rest.
Conclusions: The current data provide initial evidence of rapid DMN modulation prompted by brief cues signalling rest- and task-related state switches. rAI appears to be specifically involved in certain types of switches - those subserving general transitions to active cognitive processing.
Keywords:
task-switching,
functional MRI,
Default Mode Network,
resting state,
insula,
State-switching
Conference:
XII International Conference on Cognitive Neuroscience (ICON-XII), Brisbane, Queensland, Australia, 27 Jul - 31 Jul, 2014.
Presentation Type:
Poster
Topic:
Cognition and Executive Processes
Citation:
Sidlauskaite
J,
Wiersema
JR,
Roeyers
H,
Krebs
RM,
Vassena
E,
Fias
W,
Brass
M,
Achten
E and
Sonuga-Barke
E
(2015). Anticipatory processes in brain state switching - implicating default mode and salience networks.
Conference Abstract:
XII International Conference on Cognitive Neuroscience (ICON-XII).
doi: 10.3389/conf.fnhum.2015.217.00402
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Received:
19 Feb 2015;
Published Online:
24 Apr 2015.
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Correspondence:
Miss. Justina Sidlauskaite, Ghent University, Experimental-Clinical and Health Psychology, Ghent, Belgium, justina.sidlauskaite@ugent.be