Hippocampal involvement in working memory following refreshing
Authors:
- 2 October 2022
- journal article
- research article
- Published by Taylor & Francis in Cognitive Neuroscience
- Vol. 13 (3-4) , 215-217
Abstract
Working memory (WM) and long-term memory (LTM) tests have both overlapping and distinct neurocognitive processes. Hippocampal activity in fMRI studies–a hallmark of LTM–also occurs on WM tasks, typically during encoding or retrieval and sometimes (albeit rarely) through ‘late-delay’ periods. The Synaptic Theory of WM suggests that ‘activity-silent’ synaptic weights retain temporary, WM-relevant codes without sustained, elevated activity. The hippocampus temporarily retains item-context bindings during WM-delays that are typically ‘silent’ to fMRI, probably via oscillatory patterns of informational connectivity among task-relevant regions of cortex. Advancing WM theory will require modeling this dynamic interplay, as in the ‘Dynamic Processing Model of WM.Keywords
Funding Information
- National Science Foundation’s Division of Behavioral and Cognitive Sciences (Career Award # 1848440)
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