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Distributed Cortical Systems in Visual Short-term Memory Revealed by Event-related Functional Magnetic Resonance Imaging

Munk, M. H. J., Linden, David Edmund Johannes, Muckli, L., Lanfermann, H., Zanella, F. E., Singer, W. and Goebel, R. 2002. Distributed Cortical Systems in Visual Short-term Memory Revealed by Event-related Functional Magnetic Resonance Imaging. Cerebral Cortex 12 (8) , pp. 866-876. 10.1093/cercor/12.8.866

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Abstract

The spatio-temporal distribution of brain activity as revealed by non-invasive functional imaging helps to elucidate the neuronal encoding and processing strategies required by complex cognitive tasks. We investigated visual short-term memory for objects, places and conjunctions in humans using event-related time-resolved functional magnetic resonance imaging that permitted segregation of encoding, retention and retrieval phases. All conditions were accompanied by the activation of a widespread network of parietal and prefrontal areas during the retention phase, but this retention-related activity showed additional modulations depending on task instructions. These modulations confirmed a posterior — anterior and right — left dissociation for spatial versus non-spatial memory and revealed that conjunction memory does not rely on a linear addition of the component processes.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Medicine
Psychology
MRC Centre for Neuropsychiatric Genetics and Genomics (CNGG)
Neuroscience and Mental Health Research Institute (NMHRI)
Subjects: B Philosophy. Psychology. Religion > BF Psychology
R Medicine > RC Internal medicine > RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry
Publisher: Oxford University Press
ISSN: 1460-2199
Last Modified: 04 Jun 2017 04:13
URI: http://orca.cf.ac.uk/id/eprint/34795

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