Abstract:
:Little is known about the cognitive mechanisms of the memory impairment associated with amnestic mild cognitive impairment (aMCI). We explored recollection and familiarity in 27 healthy young adults, 45 healthy older adults, and 17 individuals with aMCI. Relative to the younger adults, recollection was reduced in the older adults, especially among those with aMCI. Familiarity did not differ among groups. In the healthy younger and older adults, better performance on a set of clinical memory measures that are sensitive to medial temporal lobe functioning was associated with greater recollection. In addition, among the healthy older adults better executive functioning was also associated with greater recollection. These results are consistent with the notion that recollection is a product of strategic processes mediated by the prefrontal cortex that suppport the retrieval of context-dependent memories from the hippocampus. Hippocampal atrophy associated with aMCI may disrupt this brain network, and thereby interfere with recollection.
journal_name
Neuropsychologyjournal_title
Neuropsychologyauthors
Anderson ND,Ebert PL,Jennings JM,Grady CL,Cabeza R,Graham SJdoi
10.1037/0894-4105.22.2.177subject
Has Abstractpub_date
2008-03-01 00:00:00pages
177-87issue
2eissn
0894-4105issn
1931-1559pii
2008-02526-005journal_volume
22pub_type
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