The Neural Correlates of Priming Specificity: Age-Related Changes in Visual Object Priming for Multiple Presentations of Similar Items

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dc.contributor.advisor Gutchess, Angela en_US
dc.contributor.author Polex Wolf, Joseph
dc.date.accessioned 2011-05-24T17:45:03Z
dc.date.available 2011-05-24T17:45:03Z
dc.date.issued 2011
dc.identifier.uri http://hdl.handle.net/10192/24397
dc.description.abstract Despite extensive declines in various explicit memory processes, priming, a form of implicit memory, may be spared in cognitive aging. However, the nature of age-related neural changes in priming tasks utilizing repetitions of perceptually similar objects, which are different exemplars of the same item, is only beginning to be understood. In the present neuroimaging study, we evaluated behavioral and neural priming for multiple presentations of similar visual objects in 18 young adults and 17 older adults. Consistent with prior work, we found comparable behavioral performance across age groups in a similar object priming task, and further observed similar patterns of engagement across age groups in the left fusiform, demonstrating that this region has a role in priming specificity for older adults. Age differences were however observed in other perceptual regions involved in priming such as parahippocampal areas and anterior portions of the left middle occipital gyrus, as well as in bilateral interior frontal areas and left middle temporal areas involved in the semantic/conceptual components of repetition priming. No systematic age differences based on the number of repetitions were discovered in either behavioral or neural measures. These results suggest that in similar visual object priming tasks, older adults might maintain behavioral performance by relying on the utilization of compensatory neural processes, yet may also depend on the engagement of the same neural networks (i.e. left fusiform) utilized in young adults for priming specificity. en_US
dc.description.sponsorship Brandeis University, Graduate School of Arts and Sciences en_US
dc.format.mimetype application/pdf en_US
dc.language English en_US
dc.language.iso eng en_US
dc.publisher Brandeis University en_US
dc.relation.ispartofseries Brandeis University Theses and Dissertations
dc.rights Copyright by Joseph Polex Wolf 2011 en_US
dc.subject Priming en_US
dc.subject Aging en_US
dc.title The Neural Correlates of Priming Specificity: Age-Related Changes in Visual Object Priming for Multiple Presentations of Similar Items en_US
dc.type Thesis en_US
dc.contributor.department Interdepartmental Program in Neuroscience en_US
dc.degree.name MS en_US
dc.degree.level Masters en_US
dc.degree.discipline Neuroscience en_US
dc.degree.grantor Brandeis University, Graduate School of Arts and Sciences en_US


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