Cited by 2,875Dementia and Cognitive Impairment ResearchAging and Gerontology ResearchCognitive Abilities and Testing

Regional Brain Changes in Aging Healthy Adults: General Trends, Individual Differences and Modifiers

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Raz, Naftali, Lindenberger, Ulman, Rodrigue, Karen M., Kennedy, Kristen M., Head, Denise, Williamson, Adrienne, Dahle, Cheryl, Gerstorf, Denis +1 more·2005·Cerebral Cortex

Abstract

Brain aging research relies mostly on cross-sectional studies, which infer true changes from age differences. We present longitudinal measures of five-year change in the regional brain volumes in healthy adults. Average and individual differences in volume changes and the effects of age, sex and hypertension were assessed with latent difference score modeling. The caudate, the cerebellum, the hippocampus and the association cortices shrunk substantially. There was minimal change in the entorhinal and none in the primary visual cortex. Longitudinal measures of shrinkage exceeded cross-sectional estimates. All regions except the inferior parietal lobule showed individual differences in change. Shrinkage of the cerebellum decreased from young to middle adulthood, and increased from middle adulthood to old age. Shrinkage of the hippocampus, the entorhinal cortices, the inferior temporal cortex and the prefrontal white matter increased with age. Moreover, shrinkage in the hippocampus and the cerebellum accelerated with age. In the hippocampus, both linear and quadratic trends in incremental age-related shrinkage were limited to the hypertensive participants. Individual differences in shrinkage correlated across some regions, suggesting common causes. No sex differences in age trends except for the caudate were observed. We found no evidence of neuroprotective effects of larger brain size or educational attainment.

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  • At some level, the burden of pathology becomes great enough to overcome the protective mechanism of reserve, resulting in rapid cognitive decline.

    “Possibly, at some level, the burden of pathology becomes great enough to overcome this protective mechanism, resulting in rapid cognitive decline31,53.”

    From Maintenance, reserve and compensation: the cognitive neuroscience of healthy ageing (2018) · cites this paper as [53]

    The Discussion says the study found no support for the brain reserve hypothesis, while noting that its cognitive measures were too narrow to settle the question. It discusses pathology and brain shrinkage, but does not address whether a threshold of pathology overcomes reserve and causes rapid cognitive decline (searched: pathology burden, reserve, protective mechanism, rapid cognitive decline). (LLM, conf=0.76)

    Experimental — accuracy not yet measured
  • Longitudinal work indicates that posterior association areas, including inferior parietal lobule, are as vulnerable to aging as prefrontal areas.

    “Because longitudinal studies show that posterior association regions, e.g., inferior parietal lobule, are just as sensitive to aging as prefrontal regions (Raz et al., 2005)”
  • Longitudinal studies have mostly revealed prominent gray matter loss in prefrontal regions, with smaller but significant decline in other regions, notably mesial temporal areas.

    “Most have revealed prominent GM loss in prefrontal regions [40,59,65,71,76] with smaller but significant decline in other regions, notably in mesial temporal areas.”
  • The advantage of a longitudinal PET-MR combined study relative to cross-sectional designs has been occasionally but not consistently shown.

    “Although a longitudinal PET-MR combined study would obviously be of considerable interest, the advantage of this approach relative to cross-sectional designs has been occasionally [40,65], but not consistently [27,75], shown.”

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  1. [18]18. Hedges L, Olkin I (1985) Statistical methods for meta-analysis. Orlando, FL: Academic Press.

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Authors
Raz, N., Lindenberger, U., Rodrigue, K. M., Kennedy, K. M., Head, D., Williamson, A., Dahle, C., Gerstorf, D., & Acker, J. D.
Affiliations
  • Wayne State University (US)
  • Max Planck Society (DE)
  • University of Washington (US)
  • University of Memphis (US)
  • Baptist Memorial Hospital (US)
Corresponding author
Raz, Naftali
Venue
Cerebral Cortex
Published
2005-02-09
Volume
15
Issue
11
Pages
1676-1689
ISSN
  • 1047-3211 (ISSN-L)
  • 1460-2199
OpenAlex
W2103069600
Cited by
2,875
References
61
Citations by year
2026: 90 · 2025: 115 · 2024: 138 · 2023: 108 · 2022: 144 · 2021: 198 · 2020: 171 · 2019: 188 · 2018: 170 · 2017: 192 · 2016: 171 · 2015: 172 · 2014: 174 · 2013: 163 · 2012: 139
FWCI
35.53
Type
journal article
Language
en
Open access
Locations
  • Cerebral Cortex (publishedVersion)
  • PubMed (publishedVersion)
  • Max Planck Institute for Plasma Physics (submittedVersion)
  • Max Planck Digital Library (submittedVersion, other-oa)
  • MPG.PuRe (Max Planck Society) (submittedVersion, other-oa)
Funders
  • Wayne State University
  • National Institute on Aging (AG-11230)
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
  • Social Sciences › Psychology › Neuropsychology and Physiological Psychology › Aging and Gerontology Research
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Cognitive Abilities and Testing
Keywords
brain aging, individual differences, hippocampus, cerebellum, caudate nucleus, entorhinal cortex, inferior parietal lobule, hypertension, sex differences, educational attainment, neuroprotection, healthy older adults
MeSH terms
Adult, Age Factors, Aged, Aged, 80 and over, Aging, Body Constitution, Brain, Female, Humans, Image Interpretation, Computer-Assisted, Magnetic Resonance Imaging, Male, Middle Aged, Organ Size, Sensitivity and Specificity, Sex Factors, Reproducibility of Results, Imaging, Three-Dimensional

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