Neuroanatomical correlates of olfactory loss in normal aged subjects

► Olfactory loss is associated in normal aged subjects with gray and white matter brain changes. ► DTI shows microstructural changes in superior longitudinal fasciculi and corpus callosum. ► VBM shows GM volume loss in entorhinal and perirhinal olfactory structures. In non-demented older persons, sm...

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Published inBehavioural brain research Vol. 246; pp. 148 - 153
Main Authors Segura, Bàrbara, Baggio, Hugo César, Solana, Elisabeth, Palacios, Eva M., Vendrell, Pere, Bargalló, Núria, Junqué, Carme
Format Journal Article
LanguageEnglish
Published Shannon Elsevier B.V 01.06.2013
Elsevier
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Online AccessGet full text
ISSN0166-4328
1872-7549
1872-7549
DOI10.1016/j.bbr.2013.02.025

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Abstract ► Olfactory loss is associated in normal aged subjects with gray and white matter brain changes. ► DTI shows microstructural changes in superior longitudinal fasciculi and corpus callosum. ► VBM shows GM volume loss in entorhinal and perirhinal olfactory structures. In non-demented older persons, smell dysfunction, measured premortem, has been associated with postmortem brain degeneration similar to that of Alzheimer's disease. We hypothesized that distinct measures of gray and white matter integrity evaluated through magnetic resonance imaging (MRI) techniques could detect degenerative changes associated with age-related olfactory dysfunction. High-resolution T1-weighted images and diffusion-tensor images (DTI) of 30 clinically healthy subjects aged 51–77 were acquired with a 3-Tesla MRI scanner. Odor identification performance was assessed by means of the University of Pennsylvania Smell Identification Test (UPSIT). UPSIT scores correlated with right amygdalar volume and bilateral perirhinal and entorhinal cortices gray matter volume. Olfactory performance also correlated with postcentral gyrus cortical thickness and with fractional anisotropy and mean diffusivity levels in the splenium of the corpus callosum and the superior longitudinal fasciculi. Our results suggest that age-related olfactory loss is accompanied by diffuse degenerative changes that might correspond to the preclinical stages of neurodegenerative processes.
AbstractList ► Olfactory loss is associated in normal aged subjects with gray and white matter brain changes. ► DTI shows microstructural changes in superior longitudinal fasciculi and corpus callosum. ► VBM shows GM volume loss in entorhinal and perirhinal olfactory structures. In non-demented older persons, smell dysfunction, measured premortem, has been associated with postmortem brain degeneration similar to that of Alzheimer's disease. We hypothesized that distinct measures of gray and white matter integrity evaluated through magnetic resonance imaging (MRI) techniques could detect degenerative changes associated with age-related olfactory dysfunction. High-resolution T1-weighted images and diffusion-tensor images (DTI) of 30 clinically healthy subjects aged 51–77 were acquired with a 3-Tesla MRI scanner. Odor identification performance was assessed by means of the University of Pennsylvania Smell Identification Test (UPSIT). UPSIT scores correlated with right amygdalar volume and bilateral perirhinal and entorhinal cortices gray matter volume. Olfactory performance also correlated with postcentral gyrus cortical thickness and with fractional anisotropy and mean diffusivity levels in the splenium of the corpus callosum and the superior longitudinal fasciculi. Our results suggest that age-related olfactory loss is accompanied by diffuse degenerative changes that might correspond to the preclinical stages of neurodegenerative processes.
In non-demented older persons, smell dysfunction, measured premortem, has been associated with postmortem brain degeneration similar to that of Alzheimer's disease. We hypothesized that distinct measures of gray and white matter integrity evaluated through magnetic resonance imaging (MRI) techniques could detect degenerative changes associated with age-related olfactory dysfunction. High-resolution T1-weighted images and diffusion-tensor images (DTI) of 30 clinically healthy subjects aged 51-77 were acquired with a 3-Tesla MRI scanner. Odor identification performance was assessed by means of the University of Pennsylvania Smell Identification Test (UPSIT). UPSIT scores correlated with right amygdalar volume and bilateral perirhinal and entorhinal cortices gray matter volume. Olfactory performance also correlated with postcentral gyrus cortical thickness and with fractional anisotropy and mean diffusivity levels in the splenium of the corpus callosum and the superior longitudinal fasciculi. Our results suggest that age-related olfactory loss is accompanied by diffuse degenerative changes that might correspond to the preclinical stages of neurodegenerative processes.
In non-demented older persons, smell dysfunction, measured premortem, has been associated with postmortem brain degeneration similar to that of Alzheimer's disease. We hypothesized that distinct measures of gray and white matter integrity evaluated through magnetic resonance imaging (MRI) techniques could detect degenerative changes associated with age-related olfactory dysfunction. High-resolution T1-weighted images and diffusion-tensor images (DTI) of 30 clinically healthy subjects aged 51-77 were acquired with a 3-Tesla MRI scanner. Odor identification performance was assessed by means of the University of Pennsylvania Smell Identification Test (UPSIT). UPSIT scores correlated with right amygdalar volume and bilateral perirhinal and entorhinal cortices gray matter volume. Olfactory performance also correlated with postcentral gyrus cortical thickness and with fractional anisotropy and mean diffusivity levels in the splenium of the corpus callosum and the superior longitudinal fasciculi. Our results suggest that age-related olfactory loss is accompanied by diffuse degenerative changes that might correspond to the preclinical stages of neurodegenerative processes.In non-demented older persons, smell dysfunction, measured premortem, has been associated with postmortem brain degeneration similar to that of Alzheimer's disease. We hypothesized that distinct measures of gray and white matter integrity evaluated through magnetic resonance imaging (MRI) techniques could detect degenerative changes associated with age-related olfactory dysfunction. High-resolution T1-weighted images and diffusion-tensor images (DTI) of 30 clinically healthy subjects aged 51-77 were acquired with a 3-Tesla MRI scanner. Odor identification performance was assessed by means of the University of Pennsylvania Smell Identification Test (UPSIT). UPSIT scores correlated with right amygdalar volume and bilateral perirhinal and entorhinal cortices gray matter volume. Olfactory performance also correlated with postcentral gyrus cortical thickness and with fractional anisotropy and mean diffusivity levels in the splenium of the corpus callosum and the superior longitudinal fasciculi. Our results suggest that age-related olfactory loss is accompanied by diffuse degenerative changes that might correspond to the preclinical stages of neurodegenerative processes.
Author Segura, Bàrbara
Junqué, Carme
Vendrell, Pere
Baggio, Hugo César
Solana, Elisabeth
Bargalló, Núria
Palacios, Eva M.
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Keywords VBM
UPSIT
Cortical thickness
MRI
DTI
Aging
Olfactory deficits
Human
Cerebral cortex
Senescence
Central nervous system
Layer thickness
Nuclear magnetic resonance imaging
Encephalon
Olfaction
Language English
License CC BY 4.0
Copyright © 2013 Elsevier B.V. All rights reserved.
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SSID ssj0004051
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Snippet ► Olfactory loss is associated in normal aged subjects with gray and white matter brain changes. ► DTI shows microstructural changes in superior longitudinal...
In non-demented older persons, smell dysfunction, measured premortem, has been associated with postmortem brain degeneration similar to that of Alzheimer's...
SourceID proquest
pubmed
pascalfrancis
crossref
elsevier
SourceType Aggregation Database
Index Database
Enrichment Source
Publisher
StartPage 148
SubjectTerms Aged
Aging
Anisotropy
Behavioral psychophysiology
Biological and medical sciences
Brain Mapping
Cortical thickness
Diffusion Magnetic Resonance Imaging
DTI
Female
Fundamental and applied biological sciences. Psychology
Humans
Image Processing, Computer-Assisted
Magnetic Resonance Imaging
Male
Middle Aged
MRI
Nerve Fibers, Myelinated - physiology
Neuroanatomy
Neuropsychological Tests
Olfaction Disorders - pathology
Olfactory deficits
Olfactory Pathways - pathology
Psychology. Psychoanalysis. Psychiatry
Psychology. Psychophysiology
Smell - physiology
UPSIT
VBM
Verbal Learning - physiology
Title Neuroanatomical correlates of olfactory loss in normal aged subjects
URI https://dx.doi.org/10.1016/j.bbr.2013.02.025
https://www.ncbi.nlm.nih.gov/pubmed/23458742
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Volume 246
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