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- Title
Distributed cortical systems in visual short-term memory revealed by event-related functional magnetic resonance imaging.
- Authors
Munk, Matthias H J; Linden, David E J; Muckli, Lars; Lanfermann, Heinrich; Zanella, Friedhelm E; Singer, Wolf; Goebel, Rainer
- 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.
- Publication
Cerebral cortex (New York, N.Y. : 1991), 2002, Vol 12, Issue 8, p866
- ISSN
1047-3211
- Publication type
Journal Article
- DOI
10.1093/cercor/12.8.866