29 recherche sur le mot-clé 'Diffusion tensor imaging'

Diffusion Tensor Imaging in Autism Spectrum Disorder: A Review / Brittany G. TRAVERS in Autism Research, 5-5 (October 2012)  

Public ISBD [article]  inAutism Research > 5-5 (October 2012) . - p.289-313 Titre : Diffusion Tensor Imaging in Autism Spectrum Disorder: A Review Type de document : Texte imprimé et/ou numérique Auteurs : Brittany G. TRAVERS, Auteur ; Nagesh ADLURU, Auteur ; Chad ENNIS, Auteur ; Do P. M. TROMP, Auteur ; Dan DESTICHE, Auteur ; Sam DORAN, Auteur ; Erin D. BIGLER, Auteur ; Nicholas LANGE, Auteur ; Janet E. LAINHART, Auteur ; Andrew A. ALEXANDER, Auteur Article en page(s) : p.289-313 Langues : Anglais (eng) Mots-clés : diffusion tensor imaging  neuroimaging  autism  white matter Index. décimale : PER Périodiques Résumé : White matter tracts of the brain allow neurons and neuronal networks to communicate and function with high efficiency. The aim of this review is to briefly introduce diffusion tensor imaging methods that examine white matter tracts and then to give an overview of the studies that have investigated white matter integrity in the brains of individuals with autism spectrum disorder (ASD). From the 48 studies we reviewed, persons with ASD tended to have decreased fractional anisotropy and increased mean diffusivity in white matter tracts spanning many regions of the brain but most consistently in regions such as the corpus callosum, cingulum, and aspects of the temporal lobe. This decrease in fractional anisotropy was often accompanied by increased radial diffusivity. Additionally, the review suggests possible atypical lateralization in some white matter tracts of the brain and a possible atypical developmental trajectory of white matter microstructure in persons with ASD. Clinical implications and future research directions are discussed. Autism Res 2012, 5: 289–313. © 2012 International Society for Autism Research, Wiley Periodicals, Inc. En ligne : http://dx.doi.org/10.1002/aur.1243 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=183 [article] Diffusion Tensor Imaging in Autism Spectrum Disorder: A Review [Texte imprimé et/ou numérique] / Brittany G. TRAVERS, Auteur ; Nagesh ADLURU, Auteur ; Chad ENNIS, Auteur ; Do P. M. TROMP, Auteur ; Dan DESTICHE, Auteur ; Sam DORAN, Auteur ; Erin D. BIGLER, Auteur ; Nicholas LANGE, Auteur ; Janet E. LAINHART, Auteur ; Andrew A. ALEXANDER, Auteur . - p.289-313. Langues : Anglais (eng) in Autism Research > 5-5 (October 2012) . - p.289-313 Mots-clés : diffusion tensor imaging  neuroimaging  autism  white matter Index. décimale : PER Périodiques Résumé : White matter tracts of the brain allow neurons and neuronal networks to communicate and function with high efficiency. The aim of this review is to briefly introduce diffusion tensor imaging methods that examine white matter tracts and then to give an overview of the studies that have investigated white matter integrity in the brains of individuals with autism spectrum disorder (ASD). From the 48 studies we reviewed, persons with ASD tended to have decreased fractional anisotropy and increased mean diffusivity in white matter tracts spanning many regions of the brain but most consistently in regions such as the corpus callosum, cingulum, and aspects of the temporal lobe. This decrease in fractional anisotropy was often accompanied by increased radial diffusivity. Additionally, the review suggests possible atypical lateralization in some white matter tracts of the brain and a possible atypical developmental trajectory of white matter microstructure in persons with ASD. Clinical implications and future research directions are discussed. Autism Res 2012, 5: 289–313. © 2012 International Society for Autism Research, Wiley Periodicals, Inc. En ligne : http://dx.doi.org/10.1002/aur.1243 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=183

Abnormal Corpus Callosum Connectivity, Socio-communicative Deficits, and Motor Deficits in Children with Autism Spectrum Disorder: A Diffusion Tensor Imaging Study / Ryuzo HANAIE in Journal of Autism and Developmental Disorders, 44-9 (September 2014)  

Public ISBD [article]  inJournal of Autism and Developmental Disorders > 44-9 (September 2014) . - p.2209-2220 Titre : Abnormal Corpus Callosum Connectivity, Socio-communicative Deficits, and Motor Deficits in Children with Autism Spectrum Disorder: A Diffusion Tensor Imaging Study Type de document : Texte imprimé et/ou numérique Auteurs : Ryuzo HANAIE, Auteur ; Ikuko MOHRI, Auteur ; Kuriko KAGITANI-SHIMONO, Auteur ; Masaya TACHIBANA, Auteur ; Junko MATSUZAKI, Auteur ; Yoshiyuki WATANABE, Auteur ; Norihiko FUJITA, Auteur ; Masako TANIIKE, Auteur Article en page(s) : p.2209-2220 Langues : Anglais (eng) Mots-clés : Diffusion tensor imaging  Tractography  Corpus callosum  Autism spectrum disorder  Motor function Index. décimale : PER Périodiques Résumé : In addition to social and communicative deficits, many studies have reported motor deficits in autism spectrum disorder (ASD). This study investigated the macro and microstructural properties of the corpus callosum (CC) of 18 children with ASD and 12 typically developing controls using diffusion tensor imaging tractography. We aimed to explore whether abnormalities of the CC were related to motor deficits, as well as social and communication deficits in children with ASD. The ASD group displayed abnormal macro and microstructure of the total CC and its subdivisions and its structural properties were related to socio-communicative deficits, but not to motor deficits in ASD. These findings advance our understanding of the contributions of the CC to ASD symptoms. En ligne : http://dx.doi.org/10.1007/s10803-014-2096-8 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=238 [article] Abnormal Corpus Callosum Connectivity, Socio-communicative Deficits, and Motor Deficits in Children with Autism Spectrum Disorder: A Diffusion Tensor Imaging Study [Texte imprimé et/ou numérique] / Ryuzo HANAIE, Auteur ; Ikuko MOHRI, Auteur ; Kuriko KAGITANI-SHIMONO, Auteur ; Masaya TACHIBANA, Auteur ; Junko MATSUZAKI, Auteur ; Yoshiyuki WATANABE, Auteur ; Norihiko FUJITA, Auteur ; Masako TANIIKE, Auteur . - p.2209-2220. Langues : Anglais (eng) in Journal of Autism and Developmental Disorders > 44-9 (September 2014) . - p.2209-2220 Mots-clés : Diffusion tensor imaging  Tractography  Corpus callosum  Autism spectrum disorder  Motor function Index. décimale : PER Périodiques Résumé : In addition to social and communicative deficits, many studies have reported motor deficits in autism spectrum disorder (ASD). This study investigated the macro and microstructural properties of the corpus callosum (CC) of 18 children with ASD and 12 typically developing controls using diffusion tensor imaging tractography. We aimed to explore whether abnormalities of the CC were related to motor deficits, as well as social and communication deficits in children with ASD. The ASD group displayed abnormal macro and microstructure of the total CC and its subdivisions and its structural properties were related to socio-communicative deficits, but not to motor deficits in ASD. These findings advance our understanding of the contributions of the CC to ASD symptoms. En ligne : http://dx.doi.org/10.1007/s10803-014-2096-8 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=238

Altered Neural Connectivity in Females, But Not Males with Autism: Preliminary Evidence for the Female Protective Effect from a Quality-Controlled Diffusion Tensor Imaging Study / J. LEI in Autism Research, 12-10 (October 2019)  

Public ISBD [article]  inAutism Research > 12-10 (October 2019) . - p.1472-1483 Titre : Altered Neural Connectivity in Females, But Not Males with Autism: Preliminary Evidence for the Female Protective Effect from a Quality-Controlled Diffusion Tensor Imaging Study Type de document : Texte imprimé et/ou numérique Auteurs : J. LEI, Auteur ; E. LECARIE, Auteur ; J. JURAYJ, Auteur ; S. BOLAND, Auteur ; D. G. SUKHODOLSKY, Auteur ; Pamela VENTOLA, Auteur ; Kevin A. PELPHREY, Auteur ; R. J. JOU, Auteur Article en page(s) : p.1472-1483 Langues : Anglais (eng) Mots-clés : anisotropy  autism spectrum disorder  diffusion tensor imaging  female  motion  sex characteristics Index. décimale : PER Périodiques Résumé : Previous studies using diffusion tensor imaging (DTI) to investigate white matter (WM) structural connectivity have suggested widespread, although inconsistent WM alterations in autism spectrum disorder (ASD), such as greater reductions in fractional anisotropy (FA). However, findings may lack generalizability because: (a) most have focused solely on the ASD male brain phenotype, and not sex-differences in WM integrity; (b) many lack stringent and transparent data quality control such as controlling for head motion in analysis. This study addressed both issues by using Tract-Based Spatial Statistics (TBSS) to separately compare WM differences in 81 ASD (56 male, 25 female; 4-21 years old) and 39 typically developing (TD; 23 males, 16 females; 5-18 years old) children and young people, carefully group-matched on sex, age, cognitive abilities, and head motion. ASD males and females were also matched on autism symptom severity. Two independent-raters completed a multistep scan quality assurance to remove images that were significantly distorted by motion artifacts before analysis. ASD females exhibited significant widespread reductions in FA compared to TD females, suggesting altered WM integrity. In contrast, no significant localized or widespread WM differences were found between ASD and TD males. This study highlights the importance of data quality control in DTI, and outlines important sex-differences in WM alterations in ASD females. Future studies can explore the extent to which neural structural differences might underlie sex-differences in ASD behavioral phenotype, and guide clinical interventions to be tailored toward the unique needs of ASD females and males. Autism Res 2019, 12: 1472-1483. (c) 2019 The Authors. Autism Research published by International Society for Autism Research published by Wiley Periodicals, Inc. LAY SUMMARY: Previous Diffusion Tensor Imaging (DTI) studies have found atypical brain structural connectivity in males with autism, although findings are inconclusive in females with autism. To investigate potential sex-differences, we studied males and females with and without autism who showed a similar level of head movement during their brain scan. We found that females with autism had widespread atypical neural connectivity than females without autism, although not in males, highlighting sex-differences. En ligne : http://dx.doi.org/10.1002/aur.2180 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=408 [article] Altered Neural Connectivity in Females, But Not Males with Autism: Preliminary Evidence for the Female Protective Effect from a Quality-Controlled Diffusion Tensor Imaging Study [Texte imprimé et/ou numérique] / J. LEI, Auteur ; E. LECARIE, Auteur ; J. JURAYJ, Auteur ; S. BOLAND, Auteur ; D. G. SUKHODOLSKY, Auteur ; Pamela VENTOLA, Auteur ; Kevin A. PELPHREY, Auteur ; R. J. JOU, Auteur . - p.1472-1483. Langues : Anglais (eng) in Autism Research > 12-10 (October 2019) . - p.1472-1483 Mots-clés : anisotropy  autism spectrum disorder  diffusion tensor imaging  female  motion  sex characteristics Index. décimale : PER Périodiques Résumé : Previous studies using diffusion tensor imaging (DTI) to investigate white matter (WM) structural connectivity have suggested widespread, although inconsistent WM alterations in autism spectrum disorder (ASD), such as greater reductions in fractional anisotropy (FA). However, findings may lack generalizability because: (a) most have focused solely on the ASD male brain phenotype, and not sex-differences in WM integrity; (b) many lack stringent and transparent data quality control such as controlling for head motion in analysis. This study addressed both issues by using Tract-Based Spatial Statistics (TBSS) to separately compare WM differences in 81 ASD (56 male, 25 female; 4-21 years old) and 39 typically developing (TD; 23 males, 16 females; 5-18 years old) children and young people, carefully group-matched on sex, age, cognitive abilities, and head motion. ASD males and females were also matched on autism symptom severity. Two independent-raters completed a multistep scan quality assurance to remove images that were significantly distorted by motion artifacts before analysis. ASD females exhibited significant widespread reductions in FA compared to TD females, suggesting altered WM integrity. In contrast, no significant localized or widespread WM differences were found between ASD and TD males. This study highlights the importance of data quality control in DTI, and outlines important sex-differences in WM alterations in ASD females. Future studies can explore the extent to which neural structural differences might underlie sex-differences in ASD behavioral phenotype, and guide clinical interventions to be tailored toward the unique needs of ASD females and males. Autism Res 2019, 12: 1472-1483. (c) 2019 The Authors. Autism Research published by International Society for Autism Research published by Wiley Periodicals, Inc. LAY SUMMARY: Previous Diffusion Tensor Imaging (DTI) studies have found atypical brain structural connectivity in males with autism, although findings are inconclusive in females with autism. To investigate potential sex-differences, we studied males and females with and without autism who showed a similar level of head movement during their brain scan. We found that females with autism had widespread atypical neural connectivity than females without autism, although not in males, highlighting sex-differences. En ligne : http://dx.doi.org/10.1002/aur.2180 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=408

Atypical structural connectivity of language networks in autism spectrum disorder: A meta-analysis of diffusion tensor imaging studies / Min LI in Autism Research, 15-9 (September 2022)  

Public ISBD [article]  inAutism Research > 15-9 (September 2022) . - p.1585-1602 Titre : Atypical structural connectivity of language networks in autism spectrum disorder: A meta-analysis of diffusion tensor imaging studies Type de document : Texte imprimé et/ou numérique Auteurs : Min LI, Auteur ; Yide WANG, Auteur ; Masaya TACHIBANA, Auteur ; Shafiur RAHMAN, Auteur ; Kuriko KAGITANI-SHIMONO, Auteur Article en page(s) : p.1585-1602 Langues : Anglais (eng) Mots-clés : Adult  Autism Spectrum Disorder/diagnostic imaging  Brain/diagnostic imaging  Child  Child Development Disorders, Pervasive/diagnosis  Diffusion Tensor Imaging  Humans  White Matter/diagnostic imaging  autism spectrum disorder  language networks  meta-analysis  white matter connectivity Index. décimale : PER Périodiques Résumé : Patients with autism spectrum disorder (ASD) often show pervasive and complex language impairments that are closely associated with aberrant structural connectivity of language networks. However, the characteristics of white matter connectivity in ASD have remained inconclusive in previous diffusion tensor imaging (DTI) studies. The current meta-analysis aimed to comprehensively elucidate the abnormality in language-related white matter connectivity in individuals with ASD. We searched PubMed, Web of Science, Scopus, and Medline databases to identify relevant studies. The standardized mean difference was calculated to measure the pooled difference in DTI metrics in each tract between the ASD and typically developing (TD) groups. The moderating effects of age, sex, language ability, and symptom severity were investigated using subgroup and meta-regression analysis. Thirty-three DTI studies involving 831 individuals with ASD and 836 TD controls were included in the meta-analysis. ASD subjects showed significantly lower fractional anisotropy or higher mean diffusivity across language-associated tracts than TD controls. These abnormalities tended to be more prominent in the left language networks than in the right. In addition, children with ASD exhibit more pronounced and pervasive disturbances in white matter connectivity than adults. These results support the under-connectivity hypothesis and demonstrate the widespread abnormal microstructure of language-related tracts in patients with ASD. Otherwise, white matter abnormalities in the autistic brain could vary depending on the developmental stage and hemisphere. LAY SUMMARY: This meta-analysis explored abnormalities in white matter connectivity in language networks of individuals with ASD. Significantly reduced white matter integrity was found in all language-associated tracts in subjects with ASD compared with TD controls. In addition, structural disturbances of language networks in the autistic brain exhibit a leftward tendency, and more prominent abnormalities are observed in younger people with ASD than in adults. En ligne : http://dx.doi.org/10.1002/aur.2789 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=483 [article] Atypical structural connectivity of language networks in autism spectrum disorder: A meta-analysis of diffusion tensor imaging studies [Texte imprimé et/ou numérique] / Min LI, Auteur ; Yide WANG, Auteur ; Masaya TACHIBANA, Auteur ; Shafiur RAHMAN, Auteur ; Kuriko KAGITANI-SHIMONO, Auteur . - p.1585-1602. Langues : Anglais (eng) in Autism Research > 15-9 (September 2022) . - p.1585-1602 Mots-clés : Adult  Autism Spectrum Disorder/diagnostic imaging  Brain/diagnostic imaging  Child  Child Development Disorders, Pervasive/diagnosis  Diffusion Tensor Imaging  Humans  White Matter/diagnostic imaging  autism spectrum disorder  language networks  meta-analysis  white matter connectivity Index. décimale : PER Périodiques Résumé : Patients with autism spectrum disorder (ASD) often show pervasive and complex language impairments that are closely associated with aberrant structural connectivity of language networks. However, the characteristics of white matter connectivity in ASD have remained inconclusive in previous diffusion tensor imaging (DTI) studies. The current meta-analysis aimed to comprehensively elucidate the abnormality in language-related white matter connectivity in individuals with ASD. We searched PubMed, Web of Science, Scopus, and Medline databases to identify relevant studies. The standardized mean difference was calculated to measure the pooled difference in DTI metrics in each tract between the ASD and typically developing (TD) groups. The moderating effects of age, sex, language ability, and symptom severity were investigated using subgroup and meta-regression analysis. Thirty-three DTI studies involving 831 individuals with ASD and 836 TD controls were included in the meta-analysis. ASD subjects showed significantly lower fractional anisotropy or higher mean diffusivity across language-associated tracts than TD controls. These abnormalities tended to be more prominent in the left language networks than in the right. In addition, children with ASD exhibit more pronounced and pervasive disturbances in white matter connectivity than adults. These results support the under-connectivity hypothesis and demonstrate the widespread abnormal microstructure of language-related tracts in patients with ASD. Otherwise, white matter abnormalities in the autistic brain could vary depending on the developmental stage and hemisphere. LAY SUMMARY: This meta-analysis explored abnormalities in white matter connectivity in language networks of individuals with ASD. Significantly reduced white matter integrity was found in all language-associated tracts in subjects with ASD compared with TD controls. In addition, structural disturbances of language networks in the autistic brain exhibit a leftward tendency, and more prominent abnormalities are observed in younger people with ASD than in adults. En ligne : http://dx.doi.org/10.1002/aur.2789 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=483

Autism as a disconnection syndrome: A qualitative and quantitative review of diffusion tensor imaging studies / Margot HOPPENBROUWERS in Research in Autism Spectrum Disorders, 8-4 (April 2014)  

Public ISBD [article]  inResearch in Autism Spectrum Disorders > 8-4 (April 2014) . - p.387-412 Titre : Autism as a disconnection syndrome: A qualitative and quantitative review of diffusion tensor imaging studies Type de document : Texte imprimé et/ou numérique Auteurs : Margot HOPPENBROUWERS, Auteur ; Maaike VANDERMOSTEN, Auteur ; Bart BOETS, Auteur Article en page(s) : p.387-412 Mots-clés : Autism spectrum disorder  Diffusion tensor imaging  Review  Brain connectivity  Fibre tracking Index. décimale : PER Périodiques Résumé : This review aims at evaluating the leading hypothesis of lower long-range and greater short-range cortical connectivity in individuals with autism spectrum disorder (ASD) by the available literature on diffusion tensor imaging (DTI) studies. DTI, coupled with tractography, assesses the structural connections between cortical regions and quantifies their white matter integrity. First, we provide an extensive qualitative overview of DTI findings in ASD. Next, to reveal convergence between studies, results are quantitatively analyzed using Activation Likelihood Estimation (ALE) and fibre tracking is performed to visualize the white matter tracts running through the obtained ALE clusters. Finally, findings from DTI research are related to specific symptoms characteristic of ASD. Overall, the qualitative analysis yields a widespread disruption of white matter integrity in the brain of individuals with ASD as compared to typically developing controls. This is the case for both the long-range and the local short-range connections, partially contradicting the leading hypothesis. However, several studies investigating very young children with ASD report greater structural connectivity, suggesting a developmental switch in white matter integrity in the ASD brain. Based on the combined qualitative and quantitative analysis, the corpus callosum and the ventral tracts emerge as particularly affected connections in individuals with ASD. En ligne : http://dx.doi.org/10.1016/j.rasd.2013.12.018 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=226 [article] Autism as a disconnection syndrome: A qualitative and quantitative review of diffusion tensor imaging studies [Texte imprimé et/ou numérique] / Margot HOPPENBROUWERS, Auteur ; Maaike VANDERMOSTEN, Auteur ; Bart BOETS, Auteur . - p.387-412. in Research in Autism Spectrum Disorders > 8-4 (April 2014) . - p.387-412 Mots-clés : Autism spectrum disorder  Diffusion tensor imaging  Review  Brain connectivity  Fibre tracking Index. décimale : PER Périodiques Résumé : This review aims at evaluating the leading hypothesis of lower long-range and greater short-range cortical connectivity in individuals with autism spectrum disorder (ASD) by the available literature on diffusion tensor imaging (DTI) studies. DTI, coupled with tractography, assesses the structural connections between cortical regions and quantifies their white matter integrity. First, we provide an extensive qualitative overview of DTI findings in ASD. Next, to reveal convergence between studies, results are quantitatively analyzed using Activation Likelihood Estimation (ALE) and fibre tracking is performed to visualize the white matter tracts running through the obtained ALE clusters. Finally, findings from DTI research are related to specific symptoms characteristic of ASD. Overall, the qualitative analysis yields a widespread disruption of white matter integrity in the brain of individuals with ASD as compared to typically developing controls. This is the case for both the long-range and the local short-range connections, partially contradicting the leading hypothesis. However, several studies investigating very young children with ASD report greater structural connectivity, suggesting a developmental switch in white matter integrity in the ASD brain. Based on the combined qualitative and quantitative analysis, the corpus callosum and the ventral tracts emerge as particularly affected connections in individuals with ASD. En ligne : http://dx.doi.org/10.1016/j.rasd.2013.12.018 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=226

Autism Spectrum Disorder: Does Neuroimaging Support the DSM-5 Proposal for a Symptom Dyad? A Systematic Review of Functional Magnetic Resonance Imaging and Diffusion Tensor Imaging Studies / Laura PINA-CAMACHO in Journal of Autism and Developmental Disorders, 42-7 (July 2012)  

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Tract-specific analyses of diffusion tensor imaging show widespread white matter compromise in autism spectrum disorder / Dinesh K. SHUKLA in Journal of Child Psychology and Psychiatry, 52-3 (March 2011)  

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Atypical diffusion tensor hemispheric asymmetry in autism / Nicholas LANGE in Autism Research, 3-6 (December 2010)  

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Autism Spectrum Disorder as Early Neurodevelopmental Disorder: Evidence from the Brain Imaging Abnormalities in 2–3 Years Old Toddlers / Zhou XIAO in Journal of Autism and Developmental Disorders, 44-7 (July 2014)  

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Neurite orientation dispersion and density imaging reveals white matter microstructural alterations in adults with autism / C. ANDICA in Molecular Autism, 12 (2021)  

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