Explorations of object and location memory using fMRI

Content-specific sub-systems of visual working memory (VWM) have been explored in many neuroimaging studies with inconsistent findings and procedures across experiments. The present study employed functional magnetic resonance imaging (fMRI) and a change detection task using a high number of trials...

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Published inFrontiers in behavioral neuroscience Vol. 7; p. 105
Main Authors Passaro, Antony D, Elmore, L Caitlin, Ellmore, Timothy M, Leising, Kenneth J, Papanicolaou, Andrew C, Wright, Anthony A
Format Journal Article
LanguageEnglish
Published Switzerland Frontiers Research Foundation 15.08.2013
Frontiers Media S.A
Subjects
Brain
domain specificity
fMRI
Functional magnetic resonance imaging
location
Medical imaging
Memory
Neuroimaging
Neuroscience
Neurosciences
object
Short term memory
Studies
working memory
United States > US
domain specificity
fMRI
location
working memory
object
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Summary:Content-specific sub-systems of visual working memory (VWM) have been explored in many neuroimaging studies with inconsistent findings and procedures across experiments. The present study employed functional magnetic resonance imaging (fMRI) and a change detection task using a high number of trials and matched stimulus displays across object and location change (what vs. where) conditions. Furthermore, individual task periods were studied independently across conditions to identify differences corresponding to each task period. Importantly, this combination of task controls has not previously been described in the fMRI literature. Composite results revealed differential frontoparietal activation during each task period. A separation of object and location conditions yielded a distributed system of dorsal and ventral streams during the encoding of information corresponding to bilateral inferior parietal lobule (IPL) and lingual gyrus activation, respectively. Differential activity was also shown during the maintenance of information in middle frontal structures bilaterally for objects and the right IPL and left insula for locations. Together, these results reflect a domain-specific dissociation spanning several cortices and task periods. Furthermore, differential activations suggest a general caudal-rostral separation corresponding to object and location memory, respectively.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
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Reviewed by: René Hurlemann, University of Bonn, Germany; Markus Muehlhan, Technische Universitaet Dresden, Germany
Edited by: Jack Van Honk, Utrecht University, Netherlands
ISSN:1662-5153
1662-5153
DOI:10.3389/fnbeh.2013.00105