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Measuring Granger Causality between Cortical Regions from Voxelwise fMRI BOLD Signals with LASSO
Title
Measuring Granger Causality between Cortical Regions from Voxelwise fMRI BOLD Signals with LASSO.
Creator
Tang, Wei, Bressler, Steven L., Sylvester, Chad M., Shulman, Gordon L., Corbetta, Maurizio, Sporns, Olaf
Date Issued
2012-05-24
PURL
http://purl.flvc.org/fau/fd/FAUIR000095
Format
Citation
Investigation of human visual spatial attention with fMRI and Granger Causality analysis
Title
Investigation of human visual spatial attention with fMRI and Granger Causality analysis.
Creator
Tang, Wei, Charles E. Schmidt College of Science, Center for Complex Systems and Brain Sciences
Abstract/Description
Contemporary understanding of human visual spatial attention rests on the hypothesis of a top-down control sending from cortical regions carrying higher-level functions to sensory regions. Evidence has been gathered through functional Magnetic Resonance Imaging (fMRI) experiments. The Frontal Eye Field (FEF) and IntraParietal Sulcus (IPS) are candidates proposed to form the frontoparietal attention network for top-down control. In this work we examined the influence patterns between...
Show moreContemporary understanding of human visual spatial attention rests on the hypothesis of a top-down control sending from cortical regions carrying higher-level functions to sensory regions. Evidence has been gathered through functional Magnetic Resonance Imaging (fMRI) experiments. The Frontal Eye Field (FEF) and IntraParietal Sulcus (IPS) are candidates proposed to form the frontoparietal attention network for top-down control. In this work we examined the influence patterns between frontoparietal network and Visual Occipital Cortex (VOC) using a statistical measure, Granger Causality (GC), with fMRI data acquired from subjects participated in a covert attention task. We found a directional asymmetry in GC between FEF/IPS and VOC, and further identified retinotopically specific control patterns in top-down GC. This work may lead to deeper understanding of goal-directed attention, as well as the application of GC to analyzing higher-level cognitive functions in healthy functioning human brain.
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Date Issued
2011
PURL
http://purl.flvc.org/FAU/3334101
Subject Headings
Attention, Physiological aspects, Cognitive neuroscience, Brain, Magnetic resonance imaging, Sensorimotor integration, Movement sequences, Human information processing, Cognitive psychology, Visual perception, Testing
Format
Document (PDF)