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Specific and general relationships between cortical thickness and cognition in older adults: a longitudinal study. | LitMetric

Specific and general relationships between cortical thickness and cognition in older adults: a longitudinal study.

Neurobiol Aging

Center for Vital Longevity and School of Behavioral and Brain Sciences, The University of Texas at Dallas, Dallas, TX, USA; School of Psychology, University of East Anglia, Norwich, UK.

Published: June 2021

AI Article Synopsis

  • * Findings reveal that right IFG thickness is linked to initial cognitive performance and memory change, but these relationships diminish when accounting for thickness in other brain areas.
  • * Most connections between cortical thickness and cognitive ability drop out when controlling for shared variance across cognitive domains, suggesting a broader, less specific relationship between brain structure and cognitive function.

Article Abstract

Prior studies suggest that relationships between regional cortical thickness and domain-specific cognitive performance can be mediated by the relationship between global cortical thickness and domain-general cognition. Whether such findings extend to longitudinal cognitive change remains unclear. Here, we examined the relationships in healthy older adults between cognitive performance, longitudinal cognitive change over 3 years, and cortical thickness at baseline of the left and right inferior frontal gyrus (IFG) and left and right hemispheres. Both right IFG and right hemisphere thickness predicted baseline general cognition and domain-specific cognitive performance. Right IFG thickness was also predictive of longitudinal memory change. However, right IFG thickness was uncorrelated with cognitive performance and memory change after controlling for the mean thickness of other ipsilateral cortical regions. In addition, most identified associations between cortical thickness and specific cognitive domains were nonsignificant after controlling for the variance shared with other cognitive domains. Thus, relationships between right IFG thickness, cognitive performance, and memory change appear to be largely accounted for by more generic relationships between cortical thickness and cognition. This article is part of the Virtual Special Issue titled "COGNITIVE NEUROSCIENCE OF HEALTHY AND PATHOLOGICAL AGING". The full issue can be found on ScienceDirect athttps://www.sciencedirect.com/journal/neurobiology-of-aging/special-issue/105379XPWJP.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8110604PMC
http://dx.doi.org/10.1016/j.neurobiolaging.2020.11.004DOI Listing

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