» Articles » PMID: 29149632

Brain Structural Differences Between 73- and 92-year Olds Matched for Childhood Intelligence, Social Background, and Intracranial Volume

Abstract

Fully characterizing age differences in the brain is a key task for combating aging-related cognitive decline. Using propensity score matching on 2 independent, narrow-age cohorts, we used data on childhood cognitive ability, socioeconomic background, and intracranial volume to match participants at mean age of 92 years (n = 42) to very similar participants at mean age of 73 years (n = 126). Examining a variety of global and regional structural neuroimaging variables, there were large differences in gray and white matter volumes, cortical surface area, cortical thickness, and white matter hyperintensity volume and spatial extent. In a mediation analysis, the total volume of white matter hyperintensities and total cortical surface area jointly mediated 24.9% of the relation between age and general cognitive ability (tissue volumes and cortical thickness were not significant mediators in this analysis). These findings provide an unusual and valuable perspective on neurostructural aging, in which brains from the 8th and 10th decades of life differ widely despite the same cognitive, socioeconomic, and brain-volumetric starting points.

Citing Articles

Are neuropsychiatric symptoms a marker of small vessel disease progression in older adults? Evidence from the Lothian Birth Cohort 1936.

Clancy U, Radakovic R, Doubal F, Valdes Hernandez M, Munoz Maniega S, Taylor A Int J Geriatr Psychiatry. 2022; 38(1):e5855.

PMID: 36490272 PMC: 10108049. DOI: 10.1002/gps.5855.


Of differing methods, disputed estimates and discordant interpretations: the meta-analytical multiverse of brain volume and IQ associations.

Pietschnig J, Gerdesmann D, Zeiler M, Voracek M R Soc Open Sci. 2022; 9(5):211621.

PMID: 35573038 PMC: 9096623. DOI: 10.1098/rsos.211621.


Magnetic resonance metrics to evaluate the effect of therapy in amyotrophic lateral sclerosis: the experience with edaravone.

Distaso E, Milella G, Mezzapesa D, Introna A, DErrico E, Fraddosio A J Neurol. 2021; 268(9):3307-3315.

PMID: 33655342 PMC: 8357666. DOI: 10.1007/s00415-021-10495-9.


Energy Metabolism Decline in the Aging Brain-Pathogenesis of Neurodegenerative Disorders.

Blaszczyk J Metabolites. 2020; 10(11).

PMID: 33171879 PMC: 7695180. DOI: 10.3390/metabo10110450.


The Whole Picture: From Isolated to Global MRI Measures of Neurovascular and Neurodegenerative Disease.

Dickie D, Quinn T, Dawson J Adv Exp Med Biol. 2020; 1205:25-53.

PMID: 31894568 DOI: 10.1007/978-3-030-31904-5_3.


References
1.
S K, Y A, Rj H, Ij D, Oc L, C L . Positive association between cognitive ability and cortical thickness in a representative US sample of healthy 6 to 18 year-olds. Intelligence. 2010; 37(2):145-155. PMC: 2678742. DOI: 10.1016/j.intell.2008.09.006. View

2.
Aribisala B, Royle N, Valdes Hernandez M, Murray C, Penke L, Gow A . Potential effect of skull thickening on the associations between cognition and brain atrophy in ageing. Age Ageing. 2014; 43(5):712-6. DOI: 10.1093/ageing/afu070. View

3.
Panza F, Frisardi V, Capurso C, DIntrono A, Colacicco A, Imbimbo B . Late-life depression, mild cognitive impairment, and dementia: possible continuum?. Am J Geriatr Psychiatry. 2010; 18(2):98-116. DOI: 10.1097/JGP.0b013e3181b0fa13. View

4.
Brayne C . The elephant in the room - healthy brains in later life, epidemiology and public health. Nat Rev Neurosci. 2007; 8(3):233-9. DOI: 10.1038/nrn2091. View

5.
Lakens D . Calculating and reporting effect sizes to facilitate cumulative science: a practical primer for t-tests and ANOVAs. Front Psychol. 2013; 4:863. PMC: 3840331. DOI: 10.3389/fpsyg.2013.00863. View