You are here
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. |
 115 views 22 downloads |
|---|---|---|
| Name(s): |
Tang, Wei Charles E. Schmidt College of Science Center for Complex Systems and Brain Sciences |
|
| Type of Resource: | text | |
| Genre: | Electronic Thesis Or Dissertation | |
| Date Issued: | 2011 | |
| Publisher: | Florida Atlantic University | |
| Physical Form: | electronic | |
| Extent: | xi, 111p. : ill. (some col.) | |
| Language(s): | English | |
| Summary: | 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 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. | |
| Identifier: | 778700403 (oclc), 3334101 (digitool), FADT3334101 (IID), fau:3818 (fedora) | |
| Note(s): |
by Wei Tang. Thesis (Ph.D.)--Florida Atlantic University, 2011. Includes bibliography. Electronic reproduction. Boca Raton, Fla., 2011. Mode of access: World Wide Web. |
|
| Subject(s): |
Attention -- Physiological aspects Cognitive neuroscience Brain -- Magnetic resonance imaging Sensorimotor integration Movement sequences Human information processing Cognitive psychology Visual perception -- Testing |
|
| Persistent Link to This Record: | http://purl.flvc.org/FAU/3334101 | |
| Use and Reproduction: | http://rightsstatements.org/vocab/InC/1.0/ | |
| Host Institution: | FAU |
