Hippocampal viscoelasticity and episodic memory performance in healthy older adults examined with magnetic resonance elastography.
Episodic memory is particularly sensitive to normative aging; however, studies investigating the structure-function relationships that support episodic memory have primarily been limited to gross volumetric measures of brain tissue health. Magnetic resonance elastography (MRE) is an emerging non-inv...
| Publicado en: | Brain Imaging & Behavior Vol. 14; no. 1; pp. 175 - 186 |
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| Autores principales: | , , , , , , |
| Formato: | Journal Article |
| Publicado: |
Springer Nature
Feb2020
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=141624963&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 141624963 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 19317557 3GSC jtl: Brain Imaging & Behavior issn: 19317557 maglogo: N pubinfo: dt: Feb2020 vid: 14 iid: 1 pid: 237 pub: Springer Nature place: New York, New York artinfo: ui: 141624963 141624963 NLM30382528 10.1007/s11682-018-9988-8 NLM30382528 141624963 ppf: 175 ppct: 11 formats: fmt: – @attributes: type: T – @attributes: type: P tig: atl: Hippocampal viscoelasticity and episodic memory performance in healthy older adults examined with magnetic resonance elastography. aug: au: Hiscox, Lucy V. Johnson, Curtis L. McGarry, Matthew D. J. Schwarb, Hillary van Beek, Edwin J. R. Roberts, Neil Starr, John M. affil: Alzheimer Scotland Dementia Research Centre, University of Edinburgh, Edinburgh, UK sug: subj: Ultrasonography Methods Memory Hippocampus Physiology Male Research Subjects Cognition Memory Disorders Pathology Brain Mapping Methods Intelligence Female Aged Magnetic Resonance Imaging Methods Neuropsychological Tests Biochemical Phenomena Hippocampus Scales Wechsler Memory Scale-Revised Aged: 65+ years Male Female ab: Episodic memory is particularly sensitive to normative aging; however, studies investigating the structure-function relationships that support episodic memory have primarily been limited to gross volumetric measures of brain tissue health. Magnetic resonance elastography (MRE) is an emerging non-invasive, high-resolution imaging technique that uniquely quantifies brain viscoelasticity, and as such, provides a more specific measure of neural microstructural integrity. Recently, a significant double dissociation between orbitofrontal cortex-fluid intelligence and hippocampal-relational memory structure-function relationships was observed in young adults, highlighting the potential of sensitive MRE measures for studying brain health and its relation to cognitive function. However, the structure-function relationship observed by MRE has not yet been explored in healthy older adults. In this study, we examined the relationship between hippocampal (HC) viscoelasticity and episodic memory in cognitively healthy adults aged 66-73 years (N = 11), as measured with the verbal-paired associates (VPA) subtest from the Wechsler Memory Scale (WMS-R). Given the particular dependence of verbal memory tasks on the left HC, unilateral HC MRE measurements were considered for the first time. A significant negative correlation was found between left HC damping ratio, ξ and VPA recall score (rs = -0.77, p = 0.009), which is consistent with previous findings of a relationship between HC ξ and memory performance in young adults. Conversely, correlations between right HC ξ with VPA recall score were not significant. These results highlight the utility of MRE to study cognitive decline and brain aging and suggest its possible use as a sensitive imaging biomarker for memory-related impairments. pubtype: Academic Journal doctype: Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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