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Fractionating Executive Control in the Human Brain: A Within-Subjects fMRI Study

Fractionating Executive Control in the Human Brain: A Within-Subjects fMRI Study

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Title: Fractionating Executive Control in the Human Brain: A Within-Subjects fMRI Study
Author: Lemire-Rodger, Sabrina
Abstract: Executive control processes have been found to cluster around three factors: updating, inhibition and task switching. However, few studies have directly investigated the fractionation of executive control in the brain, and none have examined convergent and divergent patterns of neural activity for all three using matched tasks in a single scanning protocol. Using a novel paradigm that manipulates executive control demands while keeping other task demands constant, we directly assessed the dissociability of the neural correlates of updating, inhibition and task switching. Our analyses revealed diverse patterns of brain activity associated with each executive control process. Though several interpretations of the data are considered, our results provide strong evidence that executive functions are dissociable at the level of the brain.
Subject: Neurosciences
Cognitive psychology
Psychology
Keywords: Executive functioning
Executive function
Cognitive control
Frontal lobes
Cognitive neuroscience
Updating
Working memory
Inhibition
Task switching
Shifting
Functional magnetic resonance imaging
fMRI
Partial Least Squares
PLS
Neural networks
Type: Electronic Thesis or Dissertation
Rights: Author owns copyright, except where explicitly noted. Please contact the author directly with licensing requests.
URI: http://hdl.handle.net/10315/29884
Supervisor: Turner, Gary
Degree: MA - Master of Arts
Program: Psychology (Functional Area: Clinical Psychology)
Exam date: 2014-09-10
Publish on: 2015-08-28

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