Bird, CM;
Keidel, JL;
Ing, LP;
Horner, AJ;
Burgess, N;
(2015)
Consolidation of Complex Events via Reinstatement in Posterior Cingulate Cortex.
Journal of Neuroscience
, 35
(43)
pp. 14426-14434.
10.1523/JNEUROSCI.1774-15.2015.
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Abstract
It is well-established that active rehearsal increases the efficacy of memory consolidation. It is also known that complex events are interpreted with reference to prior knowledge. However, comparatively little attention has been given to the neural underpinnings of these effects. In healthy adults humans, we investigated the impact of effortful, active rehearsal on memory for events by showing people several short video clips and then asking them to recall these clips, either aloud (Experiment 1) or silently while in an MRI scanner (Experiment 2). In both experiments, actively rehearsed clips were remembered in far greater detail than unrehearsed clips when tested a week later. In Experiment 1, highly similar descriptions of events were produced across retrieval trials, suggesting a degree of semanticization of the memories had taken place. In Experiment 2, spatial patterns of BOLD signal in medial temporal and posterior midline regions were correlated when encoding and rehearsing the same video. Moreover, the strength of this correlation in the posterior cingulate predicted the amount of information subsequently recalled. This is likely to reflect a strengthening of the representation of the video's content. We argue that these representations combine both new episodic information and stored semantic knowledge (or "schemas"). We therefore suggest that posterior midline structures aid consolidation by reinstating and strengthening the associations between episodic details and more generic schematic information. This leads to the creation of coherent memory representations of lifelike, complex events that are resistant to forgetting, but somewhat inflexible and semantic-like in nature.
| Type: | Article |
|---|---|
| Title: | Consolidation of Complex Events via Reinstatement in Posterior Cingulate Cortex |
| Location: | United States |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1523/JNEUROSCI.1774-15.2015 |
| Publisher version: | http:/dx.doi.org/10.1523/JNEUROSCI.1774-15.2015 |
| Language: | English |
| Additional information: | Copyright © 2015 Bird, Keidel et al. This is an Open Access article distributed under the terms of the Creative Commons Attribution License Creative Commons Attribution 4.0 International, which permits unrestricted use, distribution and reproduction in any medium provided that the original work is properly attributed. |
| Keywords: | MVPA, episodic memory, fMRI, hippocampus, Adolescent, Adult, Brain Mapping, Female, Gyrus Cinguli, Hippocampus, Humans, Magnetic Resonance Imaging, Male, Memory, Mental Recall, Photic Stimulation, Practice (Psychology), Temporal Lobe, Young Adult |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology > Clinical and Experimental Epilepsy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1483609 |
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