Maximal brain size remains an important predictor of cognition in old age, independent of current brain pathology

NEUROBIOLOGY OF AGING

卷:33

Article

Farias, Sarah Tomaszewski¹  Mungas, Dan¹  Reed, Bruce^1,2  Carmichael, Owen¹  Beckett, Laurel³  Harvey, Danielle³  Olichney, John¹  Simmons, Amanda¹  DeCarli, Charles¹ 

[1] Univ Calif Davis, Dept Neurol, Sacramento, CA 95817 USA

[2] Vet Affairs No Calif Hlth Care Syst, Mental Hlth Serv, Sacramento, CA USA

[3] Univ Calif Davis, Div Biostat, Sch Med, Sacramento, CA 95817 USA

关键词: Cognition;    Cognitive impairment;    MRI;    Cognitive reserve;   

DOI  :  10.1016/j.neurobiolaging.2011.03.017

来源: Elsevier

【 摘 要 】

There is growing interest in the influence of early-life development on clinical manifestations of late-life diseases. Latent variable modeling was used to investigate how maximal brain volume (measured by intracranial volume [ICV]) and current brain volumes uniquely contribute to domain-specific cognitive performance in a group of 401 cognitively and ethnically diverse older adults. Individual effects of volumetric magnetic resonance imaging (MRI) measures including ICV were examined as predictors of episodic memory, semantic memory, spatial ability, and executive function. Total brain matter volume related to all cognitive domains; hippocampal volume was associated primarily with episodic memory; white matter hyperintensity volume was related to executive function and episodic memory. Maximal brain size as measured by ICV was related to semantic memory, executive function, and spatial ability independent of current brain volumes (ps < 0.01). Relationships between magnetic resonance imaging (MRI) variables and cognition did not differ substantially across groups defined by ethnicity, gender, and with minor exceptions, clinical diagnosis. Results suggest maximal brain development and measures of brain injury/atrophy jointly contribute to cognitive function in older people. (C) 2012 Elsevier Inc. All rights reserved.

【 授权许可】

Free