dc.contributor.advisor | Hackley, Steven Allen | eng |
dc.contributor.author | Lee, Eun-Young | eng |
dc.date.issued | 2012 | eng |
dc.date.submitted | 2012 Fall | eng |
dc.description | Title from PDF of title page (University of Missouri--Columbia, viewed on February 27, 2013). | eng |
dc.description | The entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file. | eng |
dc.description | Dissertation advisor: Steven A. Hackley | eng |
dc.description | Includes bibliographical references. | eng |
dc.description | Vita. | eng |
dc.description | Ph. D. University of Missouri--Columbia 2012. | eng |
dc.description | "December 2012" | eng |
dc.description.abstract | Two experiments were conducted to examine the mechanisms underlying deficits of visual working memory in Parkinson's disease (PD). One study combined behavioral methods with event-related potentials (ERPs), the other, behavioral methods with structural and functional magnetic resonance images (MRIs). In both experiments, participants viewed an array of colored rectangles, some of which were task-irrelevant. Then, after a brief delay, they reported whether the orientation of any relevant figures had changed. By comparing trials with and without task-irrelevant items, it was shown that poor attentional filtering contributes to poor memory, both in people with and in those without PD. Measures of basal ganglia activation prior to the retention interval were generally consistent with claims that this structure serves as a “gate-keeper” to working memory. Structural analyses identified three regions for which disease-specific atrophy was negatively correlated with capacity—the right intraparietal sulcus (IPS) and the left and right pre-supplementary motor area (pre-SMA). Thus, converging evidence from behavior, electrophysiology, and MRI indicate that lowered capacity and poor attentional filtering both underlie deficits of working memory in people with Parkinson's disease. | eng |
dc.description.bibref | Includes bibliographical references. | eng |
dc.format.extent | vii, 118 pages | eng |
dc.identifier.oclc | 872567557 | eng |
dc.identifier.uri | https://doi.org/10.32469/10355/33043 | eng |
dc.identifier.uri | https://hdl.handle.net/10355/33043 | |
dc.language | English | eng |
dc.publisher | University of Missouri--Columbia | eng |
dc.relation.ispartofcommunity | University of Missouri--Columbia. Graduate School. Theses and Dissertations | eng |
dc.rights | OpenAccess. | eng |
dc.rights.license | This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License. | |
dc.subject | visual working memory | eng |
dc.subject | memory deficit | eng |
dc.subject | attentional filtering | eng |
dc.subject | disease-specific atrophy | eng |
dc.title | The origin of working memory deficits in Parkinson's disease | eng |
dc.type | Thesis | eng |
thesis.degree.discipline | Psychological sciences (MU) | eng |
thesis.degree.grantor | University of Missouri--Columbia | eng |
thesis.degree.level | Doctoral | eng |
thesis.degree.name | Ph. D. | eng |