Effect of Aging on the Viscoelastic Properties of Hippocampal Subfields Assessed with High-Resolution MR Elastography
| Autor: | Lucy V Hiscox, Matthew D. J. McGarry, Ana M. Daugherty, Hillary Schwarb, Peyton L. Delgorio, Curtis L. Johnson, Faria Sanjana, Christopher R. Martens, Ryan T. Pohlig, James M. Ellison |
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| Rok vydání: | 2020 |
| Předmět: |
Adult
Male Aging Cognitive Neuroscience Hippocampus High resolution Hippocampal formation Viscoelasticity 030218 nuclear medicine & medical imaging 03 medical and health sciences Cellular and Molecular Neuroscience Young Adult 0302 clinical medicine Nuclear magnetic resonance medicine Humans Aged Aged 80 and over medicine.diagnostic_test Chemistry Viscosity Subiculum Middle Aged Entorhinal cortex Magnetic Resonance Imaging Magnetic resonance elastography Elasticity Imaging Techniques Female Original Article Elastography 030217 neurology & neurosurgery |
| Zdroj: | Cereb Cortex |
| ISSN: | 1460-2199 |
| Popis: | Age-related memory impairments have been linked to differences in structural brain parameters, including the integrity of the hippocampus (HC) and its distinct hippocampal subfields (HCsf). Imaging methods sensitive to the underlying tissue microstructure are valuable in characterizing age-related HCsf structural changes that may relate to cognitive function. Magnetic resonance elastography (MRE) is a noninvasive MRI technique that can quantify tissue viscoelasticity and may provide additional information about aging effects on HCsf health. Here, we report a high-resolution MRE protocol to quantify HCsf viscoelasticity through shear stiffness, μ, and damping ratio, ξ, which reflect the integrity of tissue composition and organization. HCsf exhibit distinct mechanical properties—the subiculum had the lowest μ and both subiculum and entorhinal cortex had the lowest ξ. Both measures correlated with age: HCsf μ was lower with age (P |
| Databáze: | OpenAIRE |
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