Age- and gender-related differences in brain tissue microstructure revealed by multi-component T2 relaxometry.
Neurobiol Aging
; 106: 68-79, 2021 10.
Article
en En
| MEDLINE
| ID: mdl-34252873
In spite of extensive work, inconsistent findings and lack of specificity in most neuroimaging techniques used to examine age- and gender-related patterns in brain tissue microstructure indicate the need for additional research. Here, we performed the largest Multi-component T2 relaxometry cross-sectional study to date in healthy adults (N = 145, 18-60 years). Five quantitative microstructure parameters derived from various segments of the estimated T2 spectra were evaluated, allowing a more specific interpretation of results in terms of tissue microstructure. We found similar age-related myelin water fraction (MWF) patterns in men and women but we also observed differential male related results including increased MWF content in a few white matter tracts, a faster decline with age of the intra- and extra-cellular water fraction and its T2 relaxation time (i.e. steeper age related negative slopes) and a faster increase in the free and quasi-free water fraction, spanning the whole grey matter. Such results point to a sexual dimorphism in brain tissue microstructure and suggest a lesser vulnerability to age-related changes in women.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Encéfalo
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Envejecimiento
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Imagen por Resonancia Magnética
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Caracteres Sexuales
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Neuroimagen
Tipo de estudio:
Observational_studies
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Prevalence_studies
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Risk_factors_studies
Aspecto:
Determinantes_sociais_saude
Límite:
Adolescent
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Adult
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Aged
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Aged80
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Child
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Child, preschool
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Female
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Humans
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Male
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Middle aged
Idioma:
En
Revista:
Neurobiol Aging
Año:
2021
Tipo del documento:
Article
Pais de publicación:
Estados Unidos