Journal
JOURNAL OF COGNITIVE NEUROSCIENCE
Volume 21, Issue 3, Pages 581-593Publisher
MIT PRESS
DOI: 10.1162/jocn.2008.21016
Keywords
-
Categories
Funding
- National Institute of Mental Health [MH-074692]
- National Science Foundation [BCS-0236732]
- Seaver Foundation
Ask authors/readers for more resources
Functional magnetic resonance imaging was used to identify regions involved in working memory (WM) retrieval. Neural activation was examined in two WM tasks: an item recognition task, which can be mediated by a direct-access retrieval process, and a judgment of recency task that requires a serial search. Dissociations were found in the activation patterns in the hippocampus and in the left inferior frontal gyrus (LIFG) when the probe contained the most recently studied serial position ( where a test probe can be matched to the contents of focal attention) compared to when it contained all other positions ( where retrieval is required). The data implicate the hippocampus and the LIFG in retrieval from WM, complementing their established role in long-term memory. Results further suggest that the left posterior parietal cortex (LPPC) supports serial retrieval processes that are often required to recover temporal order information. Together, these data suggest that the LPPC, the LIFG, and the hippocampus collectively support WM retrieval. Critically, the reported findings support accounts that posit a distinction between representations maintained in and outside of focal attention, but are at odds with traditional dual-store models that assume distinct mechanisms for short- and long-term memory representations.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available