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

Munk, MHJ; Linden , DE; Muckli, L; Lanfermann , H; Zanella, FE; Singer, W; Goebel, R

doi:10.1093/cercor/12.8.866

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

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https://academic.oup.com/cercor/article/12/8/866/381079
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引用

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

引用: https://hdl.handle.net/11858/00-001M-0000-0013-DF2E-A

要旨

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.