Working Memory Retrieval: Contributions of the Left Prefrontal Cortex, the Left Posterior Parietal Cortex, and the Hippocampus
- 1 March 2009
- journal article
- research article
- Published by MIT Press in Journal of Cognitive Neuroscience
- Vol. 21 (3), 581-593
- https://doi.org/10.1162/jocn.2008.21016
Abstract
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. 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. 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.Keywords
This publication has 58 references indexed in Scilit:
- Left ventrolateral prefrontal cortex and the cognitive control of memoryNeuropsychologia, 2007
- The Medial Temporal Lobe and Recognition MemoryAnnual Review of Neuroscience, 2007
- Working memory and long-term memory for faces: Evidence from fMRI and global amnesia for involvement of the medial temporal lobesHippocampus, 2006
- N‐back working memory paradigm: A meta‐analysis of normative functional neuroimaging studiesHuman Brain Mapping, 2005
- Functional MRI studies of spatial and nonspatial working memoryCognitive Brain Research, 1998
- Attended and Non-Attended States in Working Memory: Accessing Categorized StructuresJournal of Memory and Language, 1998
- Memory for Items and Memory for Relations in the Procedural/Declarative Memory FrameworkMemory, 1997
- Accessing short-term memory with semantic and phonological information: A time-course analysisMemory & Cognition, 1996
- Speed and accuracy of recency judgments for events in short-term memory.Journal of Experimental Psychology: Human Learning and Memory, 1980
- Response latencies in discriminations of recency.Journal of Experimental Psychology: Human Learning and Memory, 1979