The brain subcortical white matter and aging: A quantitative fractional anisotropy analysis

Detalhes bibliográficos
Autor(a) principal: Engelhardt,Eliasz
Data de Publicação: 2009
Outros Autores: Moreira,Denise Madeira, Laks,Jerson
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Dementia & Neuropsychologia
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1980-57642009000300228
Resumo: Abstract To study the integrity of hemispheric subcortical white matter by comparing normal young and elderly subjects using quantitative fractional anisotropy (DTI-FA). Methods: Subjects of two different age groups (young=12, elderly=12) were included. MR - GE Signa Horizon - 1.5T scans were performed. Cases with Fazekas scores £3 were assessed on FLAIR sequence. Standard parameters for DTI-FA were used. ROIs were placed at various sites of the subcortical white matter, and the genu and splenium of the midline corpus callosum. Analysis was performed using Functool. Statistics for anterior and posterior white matter, as well as the genu and splenium were compared between the groups. The study was approved by the Ethics Committee of IPUB-UFRJ and informed consent obtained. Results: DTI-FA showed lower anisotropy values in the anterior region (subcortical white matter and genu), but not in the posterior region (subcortical white matter and splenium), in elderly normal subjects compared to young subjects. Conclusion: The results may represent loss of integrity of anterior (frontal) white matter fibers in the elderly subjects. These fibers constitute important intra- and inter-hemispheric tracts, components of neural networks that provide cognitive, behavioral, motor and sensory integration. The loss of integrity of the anterior segments of the studied fiber systems with ageing, represents a disconnection process that may underlie clinical manifestations found in elderly subjects such as executive dysfunction.
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spelling The brain subcortical white matter and aging: A quantitative fractional anisotropy analysiswhite mattercorpus callosumfractional anisotropyaging.Abstract To study the integrity of hemispheric subcortical white matter by comparing normal young and elderly subjects using quantitative fractional anisotropy (DTI-FA). Methods: Subjects of two different age groups (young=12, elderly=12) were included. MR - GE Signa Horizon - 1.5T scans were performed. Cases with Fazekas scores £3 were assessed on FLAIR sequence. Standard parameters for DTI-FA were used. ROIs were placed at various sites of the subcortical white matter, and the genu and splenium of the midline corpus callosum. Analysis was performed using Functool. Statistics for anterior and posterior white matter, as well as the genu and splenium were compared between the groups. The study was approved by the Ethics Committee of IPUB-UFRJ and informed consent obtained. Results: DTI-FA showed lower anisotropy values in the anterior region (subcortical white matter and genu), but not in the posterior region (subcortical white matter and splenium), in elderly normal subjects compared to young subjects. Conclusion: The results may represent loss of integrity of anterior (frontal) white matter fibers in the elderly subjects. These fibers constitute important intra- and inter-hemispheric tracts, components of neural networks that provide cognitive, behavioral, motor and sensory integration. The loss of integrity of the anterior segments of the studied fiber systems with ageing, represents a disconnection process that may underlie clinical manifestations found in elderly subjects such as executive dysfunction.Academia Brasileira de Neurologia, Departamento de Neurologia Cognitiva e Envelhecimento2009-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1980-57642009000300228Dementia & Neuropsychologia v.3 n.3 2009reponame:Dementia & Neuropsychologiainstname:Associação de Neurologia Cognitiva e do Comportamento (ANCC)instacron:ANCC10.1590/S1980-57642009DN30300009info:eu-repo/semantics/openAccessEngelhardt,EliaszMoreira,Denise MadeiraLaks,Jersoneng2016-07-29T00:00:00Zoai:scielo:S1980-57642009000300228Revistahttp://www.demneuropsy.com.br/ONGhttps://old.scielo.br/oai/scielo-oai.php||demneuropsy@uol.com.br1980-57641980-5764opendoar:2016-07-29T00:00Dementia & Neuropsychologia - Associação de Neurologia Cognitiva e do Comportamento (ANCC)false
dc.title.none.fl_str_mv The brain subcortical white matter and aging: A quantitative fractional anisotropy analysis
title The brain subcortical white matter and aging: A quantitative fractional anisotropy analysis
spellingShingle The brain subcortical white matter and aging: A quantitative fractional anisotropy analysis
Engelhardt,Eliasz
white matter
corpus callosum
fractional anisotropy
aging.
title_short The brain subcortical white matter and aging: A quantitative fractional anisotropy analysis
title_full The brain subcortical white matter and aging: A quantitative fractional anisotropy analysis
title_fullStr The brain subcortical white matter and aging: A quantitative fractional anisotropy analysis
title_full_unstemmed The brain subcortical white matter and aging: A quantitative fractional anisotropy analysis
title_sort The brain subcortical white matter and aging: A quantitative fractional anisotropy analysis
author Engelhardt,Eliasz
author_facet Engelhardt,Eliasz
Moreira,Denise Madeira
Laks,Jerson
author_role author
author2 Moreira,Denise Madeira
Laks,Jerson
author2_role author
author
dc.contributor.author.fl_str_mv Engelhardt,Eliasz
Moreira,Denise Madeira
Laks,Jerson
dc.subject.por.fl_str_mv white matter
corpus callosum
fractional anisotropy
aging.
topic white matter
corpus callosum
fractional anisotropy
aging.
description Abstract To study the integrity of hemispheric subcortical white matter by comparing normal young and elderly subjects using quantitative fractional anisotropy (DTI-FA). Methods: Subjects of two different age groups (young=12, elderly=12) were included. MR - GE Signa Horizon - 1.5T scans were performed. Cases with Fazekas scores £3 were assessed on FLAIR sequence. Standard parameters for DTI-FA were used. ROIs were placed at various sites of the subcortical white matter, and the genu and splenium of the midline corpus callosum. Analysis was performed using Functool. Statistics for anterior and posterior white matter, as well as the genu and splenium were compared between the groups. The study was approved by the Ethics Committee of IPUB-UFRJ and informed consent obtained. Results: DTI-FA showed lower anisotropy values in the anterior region (subcortical white matter and genu), but not in the posterior region (subcortical white matter and splenium), in elderly normal subjects compared to young subjects. Conclusion: The results may represent loss of integrity of anterior (frontal) white matter fibers in the elderly subjects. These fibers constitute important intra- and inter-hemispheric tracts, components of neural networks that provide cognitive, behavioral, motor and sensory integration. The loss of integrity of the anterior segments of the studied fiber systems with ageing, represents a disconnection process that may underlie clinical manifestations found in elderly subjects such as executive dysfunction.
publishDate 2009
dc.date.none.fl_str_mv 2009-09-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1980-57642009000300228
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1980-57642009000300228
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1980-57642009DN30300009
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Academia Brasileira de Neurologia, Departamento de Neurologia Cognitiva e Envelhecimento
publisher.none.fl_str_mv Academia Brasileira de Neurologia, Departamento de Neurologia Cognitiva e Envelhecimento
dc.source.none.fl_str_mv Dementia & Neuropsychologia v.3 n.3 2009
reponame:Dementia & Neuropsychologia
instname:Associação de Neurologia Cognitiva e do Comportamento (ANCC)
instacron:ANCC
instname_str Associação de Neurologia Cognitiva e do Comportamento (ANCC)
instacron_str ANCC
institution ANCC
reponame_str Dementia & Neuropsychologia
collection Dementia & Neuropsychologia
repository.name.fl_str_mv Dementia & Neuropsychologia - Associação de Neurologia Cognitiva e do Comportamento (ANCC)
repository.mail.fl_str_mv ||demneuropsy@uol.com.br
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