Functional brain connectivity and cognition: effects of adult age and task demands

NEUROBIOLOGY OF AGING

卷:34

Article

Chou, Ying-hui¹  Chen, Nan-kuei^1,2  Madden, David J.^1,3,4 

[1] Duke Univ, Med Ctr, Brain Imaging & Anal Ctr, Durham, NC 27710 USA

[2] Duke Univ, Med Ctr, Dept Radiol, Durham, NC 27710 USA

[3] Duke Univ, Med Ctr, Dept Psychiat & Behav Sci, Durham, NC 27710 USA

[4] Duke Univ, Ctr Cognit Neurosci, Durham, NC 27710 USA

关键词: Brain connectivity;    fMRI;    Resting state;    Default mode;    Behavior-based connectivity analysis;    Aging;    Attention;    Cognition;    Visual search;    Reaction time;   

DOI  :  10.1016/j.neurobiolaging.2013.02.012

来源: Elsevier

【 摘 要 】

Previous neuroimaging research has documented that patterns of intrinsic (resting state) functional connectivity (FC) among brain regions covary with individual measures of cognitive performance. Here, we examined the relation between intrinsic FC and a reaction time (RT) measure of performance, as a function of age group and task demands. We obtained filtered, event-related functional magnetic resonance imaging data, and RT measures of visual search performance, from 21 younger adults (19-29 years old) and 21 healthy, older adults (60-87 years old). Age-related decline occurred in the connectivity strength in multiple brain regions, consistent with previous findings. Among 8 pairs of regions, across somatomotor, orbitofrontal, and subcortical networks, increasing FC was associated with faster responding (lower RT). Relative to younger adults, older adults exhibited a lower strength of this RT-connectivity relation and greater disruption of this relation by a salient but irrelevant display item (color singleton distractor). Age-related differences in the covariation of intrinsic FC and cognitive performance vary as a function of task demands. (c) 2013 Elsevier Inc. All rights reserved.

【 授权许可】

Free