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| Research article summary (published 26 Oct 2002): |
The role of the parahippocampal gyrus in source memory for external and internal events.
Full Abstract
We can discriminate between the memories of real and imagined events. In this study, the traces of the perceived external events and the imagined internal events were investigated in the established paradigm of reality monitoring using event-related fMRI. In the retrieval phase, we found that the left parahippocampal gyrus represented the traces of visually encoded memory. The right inferior parietal cortex was activated when subjects judged that the original event was imagined. We suggest that these traces are used to distinguish what is seen from what is thought during reality monitoring. Furthermore, we found that the incorrect judgments were associated with signal increases in the left frontal operculum, suggesting that this area is a candidate for the monitoring system of contextual information or failure in the retrieval phase.
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Author information
Author/s: Takahashi, Emi (E); Ohki, Kenichi (K); Miyashita, Yasushi (Y);
Affiliation: Department of Physiology, The University of Tokyo School of Medicine, Hongo, Bunkyo-ku, Tokyo, Japan.
Journal and publication information
Publication Type: Journal Article; Research Support, Non-U.S. Gov't
Journal: Neuroreport (Neuroreport), published in England. (Language: eng)
Reference: 2002-Oct; vol 13 (issue 15) : pp 1951-6
Dates: Created 2002/10/23; Completed 2003/02/07; Revised 2006/11/15;
PMID: 12395098, status: MEDLINE (last retrieval date: 11/6/2008)
Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.
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