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A crucial role for working memory in temporary information processing and guidance of complex behavior has been recognized for many decades. There is emerging consensus that working-memory maintenance results from the interactions among long-term memory representations and basic processes, including attention, that are instantiated as reentrant loops between frontal and posterior cortical areas, as...
Older adults and demented patients show preserved functioning on certain tests of implicit memory. In this issue of Neuron, Lustig and Buckner demonstrate that both groups show comparable repetition-based effects on response time and prefrontal activity relative to younger adults.
Recollecting a past episode involves remembering not only what happened but also when it happened. We used positron emission tomography (PET) to directly contrast the neural correlates of item and temporal-order memory. Subjects studied a list of words and were then scanned while retrieving information about what words were in the list or when they occurred within the list. Item retrieval was related...
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