Biological Correlates of Adult Cognition: Midlife in the United States (MIDUS)

Overview

Journal Neurobiol Aging

Publisher Elsevier

Specialties Geriatrics
Neurology
Physiology

Date 2013 Sep 10

PMID 24011541

Citations 51

Authors

Arun S Karlamangla

Dana Miller-Martinez

Margie E Lachman

Patricia A Tun

Brandon K Koretz

Teresa E Seeman

Affiliations

Soon will be listed here.

Abstract

Multiple biological processes are related to cognitive impairment in older adults, but their combined impact on cognition in midlife is not known. Using an array of measurements across key regulatory physiological systems and a state-of-the-art cognition battery that is sensitive to early changes, in a large, national sample of middle-aged and older adults, we examined the associations of individual biological systems and a combined, multi-system index, allostatic load, with cognitive performance. Allostatic load was strongly inversely associated with performance in both episodic memory and executive function. Of 7 biological systems, only the cardiovascular system was associated inversely with both; inflammation was associated inversely with episodic memory only, and glucose metabolism with executive function only. The associations of allostatic load with cognition were not different by age, suggesting that the implications of high allostatic load on cognitive functioning are not restricted to older adults. Findings suggest that a multi-system score, like allostatic load, may assist in the early identification of adults at increased risk for cognitive impairment.

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