Working Memory Retrieval: Contributions of the Left Prefrontal Cortex, the Left Posterior Parietal Cortex, and the Hippocampus
Autor: | Brian McElree, Bernhard P. Staresina, Ilke Öztekin, Lila Davachi |
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Rok vydání: | 2009 |
Předmět: |
Adult
Male Adolescent Cognitive Neuroscience Prefrontal Cortex Short-term memory Hippocampus Posterior parietal cortex Neuropsychological Tests Article Functional Laterality Judgment Young Adult Parietal Lobe Image Processing Computer-Assisted medicine Humans Attention Prefrontal cortex medicine.diagnostic_test Working memory Long-term memory Parietal lobe Recognition Psychology Magnetic Resonance Imaging Oxygen Memory Short-Term Mental Recall Female Functional magnetic resonance imaging Psychology Neuroscience Photic Stimulation Cognitive psychology |
Zdroj: | Journal of Cognitive Neuroscience. 21:581-593 |
ISSN: | 1530-8898 0898-929X |
Popis: | 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. |
Databáze: | OpenAIRE |
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