Abstract:
:Aging is associated with cognitive decline, specifically in episodic memory. However, there are large individual differences in the extent of this decline and previous research suggests that these are associated with differences in executive functioning (EF). These EF differences, and associated differences in the encoding and retrieval of episodic information, have been linked to differences in the activation of particular brain regions. The "encoding/retrieval flip" (E/R flip) framework assumes deactivation and activation of specific brain regions during successful encoding and retrieval, respectively. The present study assessed whether this framework can be used to explain EF-based individual differences in memory performance of young and older participants. Young adults (N = 19) and older adults (N = 39) performed an incidental semantic encoding and memory recognition task in an fMRI setting, focusing on brain regions that show the E/R flip. The association between an index of EF and fMRI activity in brain regions showing the E/R flip was tested in each age group. EF predicted E/R flip activity in the older, but not young adults. These findings underscore the importance of individual differences in ageing research and provide empirical evidence for the association between EF and the E/R flip.
journal_name
Neurobiol Learn Memjournal_title
Neurobiology of learning and memoryauthors
Fu L,Maes JHR,Kessels RPC,Huijbers Wdoi
10.1016/j.nlm.2020.107251subject
Has Abstractpub_date
2020-09-01 00:00:00pages
107251eissn
1074-7427issn
1095-9564pii
S1074-7427(20)30095-2journal_volume
173pub_type
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