Human anterolateral entorhinal cortex volumes are associated with cognitive decline in aging prior to clinical diagnosis

NEUROBIOLOGY OF AGING

卷:57

Article

Olsen, Rosanna K.^1,2  Yeung, Lok-Kin^2,4  Noly-Gandon, Alix¹  D'Angelo, Maria C.¹  Kacollja, Arber¹  Smith, Victoria M.²  Ryan, Jennifer D.^1,2,3  Barense, Morgan D.^1,2 

[1] Baycrest Hlth Sci, Rotman Res Inst, Toronto, ON, Canada

[2] Univ Toronto, Dept Psychol, Toronto, ON, Canada

[3] Univ Toronto, Dept Psychiat, Toronto, ON, Canada

[4] Columbia Univ, Med Ctr, Taub Inst, 630 West 168th St,P&S Box 16, New York, NY 10032 USA

关键词: Memory;    Aging;    Hippocampus;    Dementia;    Mild cognitive impairment;    Neuroimaging;   

DOI  :  10.1016/j.neurobiolaging.2017.04.025

来源: Elsevier

【 摘 要 】

We investigated whether older adults without subjective memory complaints, but who present with cognitive decline in the laboratory, demonstrate atrophy in medial temporal lobe (MTL) subregions associated with Alzheimer's disease. Forty community-dwelling older adults were categorized based on Montreal Cognitive Assessment (MoCA) performance. Total gray/white matter, cerebrospinal fluid, and white matter hyperintensity load were quantified from whole-brain T1-weighted and fluid-attenuated inversion recovery magnetic resonance imaging scans, whereas hippocampal subfields and MTL cortical subregion volumes (CA1, dentate gyrus/CA2/3, subiculum, anterolateral and posteromedial entorhinal, perirhinal, and parahippocampal cortices) were quantified using high-resolution T2-weighted scans. Cognitive status was evaluated using standard neuropsychological assessments. No significant differences were found in the whole-brain measures. However, MTL volumetry revealed that anterolateral entorhinal cortex (alERC) volumed the same region in which Alzheimer's pathology originatesd was strongly associated with MoCA performance. This is the first study to demonstrate that alERC volume is related to cognitive decline in undiagnosed community-dwelling older adults. (C) 2017 Elsevier Inc. All rights reserved.

【 授权许可】

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