Asymmetric thinning of the cerebral cortex across the adult lifespan is accelerated in Alzheimer’s disease

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Roe, JM
Vidal-Piñeiro, D
Sørensen, Ø
Brandmaier, AM
Düzel, S
Gonzalez, HA
Kievit, RA
Knights, E
Kühn, S
Lindenberger, U
Mowinckel, AM
Nyberg, L
Park, DC
Zhang, P
et al.
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2021
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http://creativecommons.org/licenses/by/4.0/
Abstract

Aging and Alzheimer’s disease (AD) are associated with progressive brain disorganization. Although structural asymmetry is an organizing feature of the cerebral cortex it is unknown whether continuous age- and AD-related cortical degradation alters cortical asymmetry. Here, in multiple longitudinal adult lifespan cohorts we show that higher-order cortical regions exhibiting pronounced asymmetry at age ~20 also show progressive asymmetry-loss across the adult lifespan. Hence, accelerated thinning of the (previously) thicker homotopic hemisphere is a feature of aging. This organizational principle showed high consistency across cohorts in the Lifebrain consortium, and both the topological patterns and temporal dynamics of asymmetry-loss were markedly similar across replicating samples. Asymmetry-change was further accelerated in AD. Results suggest a system-wide dedifferentiation of the adaptive asymmetric organization of heteromodal cortex in aging and AD.

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Nature Communications
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© The Author(s) 2021. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
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Clinical sciences
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Roe, JM; Vidal-Piñeiro, D; Sørensen, Ø; Brandmaier, AM; Düzel, S; Gonzalez, HA; Kievit, RA; Knights, E; Kühn, S; Lindenberger, U; Mowinckel, AM; Nyberg, L; Park, DC; Zhang, P; et al., Asymmetric thinning of the cerebral cortex across the adult lifespan is accelerated in Alzheimer’s disease, Nature Communications, 2021, 12 (1), pp. 721
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