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Published in: Brain Structure and Function 7/2019

01-09-2019 | Original Article

Effects of aging on sequential cognitive flexibility are associated with fronto-parietal processing deficits

Authors: Franziska Giller, Christian Beste

Published in: Brain Structure and Function | Issue 7/2019

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Abstract

Albeit cognitive flexibility is well known to decline in aging, it has not been considered that this ability often requires sequential task control. That is, one may re-use tasks that have previously been abandoned in favor of another task. It is unclear whether sequential cognitive flexibility is affected in aging and what neurophysiological mechanisms and functional neuroanatomical structures are associated with these effects. We examined this question in a system neurophysiological study using EEG and source localization in healthy and elderly adults. We show that elderly people reveal deficient sequential cognitive flexibility. Elderly people encounter increased costs to overcome the inhibition of the lately abandoned task set that becomes relevant again and needs to be re-used. The neurophysiological (EEG) data show that differences in sequential cognitive flexibility between young and elderly people emerge as a consequence of two independent, dysfunctional processes: (i) the ability to suppress task-irrelevant information and (ii) the ability to re-implement a previously abandoned task set during response selection. These independent processes were associated with activation differences in inferior frontal and inferior parietal regions. The study reveals a new facet of cognitive flexibility dysfunctions in healthy elderlies.
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Metadata
Title
Effects of aging on sequential cognitive flexibility are associated with fronto-parietal processing deficits
Authors
Franziska Giller
Christian Beste
Publication date
01-09-2019
Publisher
Springer Berlin Heidelberg
Published in
Brain Structure and Function / Issue 7/2019
Print ISSN: 1863-2653
Electronic ISSN: 1863-2661
DOI
https://doi.org/10.1007/s00429-019-01910-z

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